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142-398: A distiller performs distillation , often to produce alcohol. Distiller or distillers may also refer to: Distillation Distillation , also classical distillation , is the process of separating the component substances of a liquid mixture of two or more chemically discrete substances; the separation process is realized by way of the selective boiling of the mixture and

284-422: A theoretical plate ) will yield a purer solution of the more volatile component. In reality, each cycle at a given temperature does not occur at exactly the same position in the fractionating column; theoretical plate is thus a concept rather than an accurate description. More theoretical plates lead to better separations. A spinning band distillation system uses a spinning band of Teflon or metal to force

426-488: A Hellenistic culture. However there was considerable social mobility, increasing urbanization, and both the rural and urban population were involved in trade and had high literacy rates. In AD 212, the Constitutio Antoniniana gave Roman citizenship to all free Egyptians. The Antonine Plague struck in the late 2nd century, but Roman Egypt recovered by the 3rd century. Having escaped much of

568-554: A deme that both parents were Alexandrian citizens. Alexandrians were the only Egyptians that could obtain Roman citizenship. If a common Egyptian wanted to become a Roman citizen he would first have to become an Alexandrian citizen. The Augustan period in Egypt saw the creation of urban communities with " Hellenic " landowning elites. These landowning elites were put in a position of privilege and power and had more self-administration than

710-594: A metropolis and granted additional privileges. The inhabitants of Roman Egypt were divided by social class along ethnic and cultural lines. Most inhabitants were peasant farmers, who lived in rural villages and spoke the Egyptian language (which evolved from the Demotic Egyptian of the Late and Ptolemaic periods to Coptic under Roman rule). In each metropolis, the citizens spoke Koine Greek and followed

852-486: A proconsul , since a Roman law (a lex ) granted him "proconsular imperium " (Latin: imperium ad similitudinem proconsulis ). Unlike in senatorial provinces , the prefect was responsible for the collection of certain taxes and for the organization of the all-important grain shipments from Egypt (including the annona ). Because of these financial responsibilities, the governor's administration had to be closely controlled and organized. The governorship of Egypt

994-405: A batch distillation setup (such as in an apparatus depicted in the opening figure) until the mixture is boiling results in a vapor above the liquid that contains a mixture of A and B. The ratio between A and B in the vapor will be different from the ratio in the liquid. The ratio in the liquid will be determined by how the original mixture was prepared, while the ratio in the vapor will be enriched in

1136-439: A boiling point, although this is because its composition changes: each intermediate mixture has its own, singular boiling point. The idealized model is accurate in the case of chemically similar liquids, such as benzene and toluene . In other cases, severe deviations from Raoult's law and Dalton's law are observed, most famously in the mixture of ethanol and water. These compounds, when heated together, form an azeotrope , which

1278-479: A cemetery is 60 metres (200 ft) long and 20 metres (66 ft) wide. In the late 4th century, monastic churches differed from the other churches by building rectangular sanctuaries – rather than semi-circular ones – at their east ends where the altar stood, and in place of the apse was an aedicula or niche embellished with an arch and columns in applied in plaster. In the 5th century, regional styles of monumental church basilica with pastaphoria emerged: on

1420-487: A city founded c.  130 by the emperor Hadrian ( r.  117–138 ). All these were sacred cities dedicated to particular deities. The ruins of these cities were first methodically surveyed and sketched by intellectuals attached to Napoleon's campaign in Egypt , eventually published in the Description de l'Égypte series. Illustrations produced by Edme-François Jomard and Vivant Denon form much of

1562-691: A dough made of rye flour. These alembics often featured a cooling system around the beak, using cold water, for instance, which made the condensation of alcohol more efficient. These were called pot stills . Today, the retorts and pot stills have been largely supplanted by more efficient distillation methods in most industrial processes. However, the pot still is still widely used for the elaboration of some fine alcohols, such as cognac , Scotch whisky , Irish whiskey , tequila , rum , cachaça , and some vodkas . Pot stills made of various materials (wood, clay, stainless steel) are also used by bootleggers in various countries. Small pot stills are also sold for use in

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1704-558: A lesser degree also of mineral substances, is the main topic of the De anima in arte alkimiae , an originally Arabic work falsely attributed to Avicenna that was translated into Latin and would go on to form the most important alchemical source for Roger Bacon ( c.  1220–1292 ). The distillation of wine is attested in Arabic works attributed to al-Kindī ( c.  801–873 CE ) and to al-Fārābī ( c.  872–950 ), and in

1846-408: A lower concentration in the vapor. Indeed, batch distillation and fractionation succeed by varying the composition of the mixture. In batch distillation, the batch vaporizes, which changes its composition; in fractionation, liquid higher in the fractionation column contains more lights and boils at lower temperatures. Therefore, starting from a given mixture, it appears to have a boiling range instead of

1988-526: A method for concentrating alcohol involving repeated distillation through a water-cooled still, by which an alcohol purity of 90% could be obtained. The distillation of beverages began in the Southern Song (10th–13th century) and Jin (12th–13th century) dynasties, according to archaeological evidence. A still was found in an archaeological site in Qinglong, Hebei province, China, dating back to

2130-463: A movable liquid barrier. Finally, the entry of undesired air components can be prevented by pumping a low but steady flow of suitable inert gas, like nitrogen , into the apparatus. In simple distillation, the vapor is immediately channeled into a condenser. Consequently, the distillate is not pure but rather its composition is identical to the composition of the vapors at the given temperature and pressure. That concentration follows Raoult's law . As

2272-409: A part of some process unrelated to what now is known as distillation. In the words of Fairley and German chemical engineer Norbert Kockmann respectively: The Latin "distillo," from de-stillo, from stilla, a drop, referred to the dropping of a liquid by human or artificial means, and was applied to any process where a liquid was separated in drops. To distil in the modern sense could only be expressed in

2414-419: A partial distillation results in partial separations of the mixture's components, which process yields nearly-pure components; partial distillation also realizes partial separations of the mixture to increase the concentrations of selected components. In either method, the separation process of distillation exploits the differences in the relative volatility of the component substances of the heated mixture. In

2556-418: A record of soldiers' service history, six bronze Roman military diplomas dating between 83 and 206 are the main source of documentary evidence for the auxilia in Egypt; these inscribed certificates rewarded 25 or 26 years of military service in the auxilia with Roman citizenship and the right of conubium . That the army was more Greek-speaking than in other provinces is certain. The heart of

2698-442: A result, simple distillation is effective only when the liquid boiling points differ greatly (rule of thumb is 25 °C) or when separating liquids from non-volatile solids or oils. For these cases, the vapor pressures of the components are usually different enough that the distillate may be sufficiently pure for its intended purpose. A cutaway schematic of a simple distillation operation is shown at right. The starting liquid 15 in

2840-407: A rival power base (as Mark Antony had been able to do), while the military legati commanding the legions were career soldiers, formerly centurions with the senior rank of primus pilus , rather than politicians whose military experience was limited to youthful service as a military tribune . Beneath the praefectus Aegypti , the overall commander of legions and auxilia stationed in Egypt

2982-482: A roundabout manner. Distillation had a broader meaning in ancient and medieval times because nearly all purification and separation operations were subsumed under the term distillation , such as filtration, crystallization, extraction, sublimation, or mechanical pressing of oil. According to Dutch chemical historian Robert J. Forbes , the word distillare (to drip off) when used by the Romans, e.g. Seneca and Pliny

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3124-402: A royal scribe ( βασιλικός γραμματεύς , basilikós grammateús , 'royal secretary'). These scribes were responsible for their nome 's financial affairs, including administration of all property, land, land revenues, and temples, and what remains of their record-keeping is unparalleled in the ancient world for its completeness and complexity. The royal scribes could act as proxy for

3266-479: A temple of Serapis and a tetrastyle at Diospolis Magna at Thebes , and, at Philae , a triumphal arch and temples dedicated to the worship of the emperor Augustus and the goddess Roma , the personification of Rome. Besides a few individual stone blocks in some mētropoleis , substantial remains of Roman architecture are known in particular from three of the mētropoleis – Heracleopolis Magna , Oxyrhynchus , and Hermopolis Magna – as well as from Antinoöpolis ,

3408-444: A time. Three or four alae of cavalry were stationed in Egypt, each ala numbering around 500 horsemen. There were between seven and ten cohortes of auxilia infantry, each cohors about 500 hundred strong, although some were cohortes equitatae – mixed units of 600 men, with infantry and cavalry in a roughly 4:1 ratio. Besides the auxilia stationed at Alexandria, at least three detachments permanently garrisoned

3550-424: A vacuum pump. The components are connected by ground glass joints . For many cases, the boiling points of the components in the mixture will be sufficiently close that Raoult's law must be taken into consideration. Therefore, fractional distillation must be used to separate the components by repeated vaporization-condensation cycles within a packed fractionating column. This separation, by successive distillations,

3692-726: A wide column with a large holdup. Conversely, a column with a low reflux ratio must have a large number of stages, thus requiring a taller column. Both batch and continuous distillations can be improved by making use of a fractionating column on top of the distillation flask. The column improves separation by providing a larger surface area for the vapor and condensate to come into contact. This helps it remain at equilibrium for as long as possible. The column can even consist of small subsystems ('trays' or 'dishes') which all contain an enriched, boiling liquid mixture, all with their own vapor–liquid equilibrium. There are differences between laboratory-scale and industrial-scale fractionating columns, but

3834-416: Is a flow from the condenser back to the column, which generates a recycle that allows a better separation with a given number of trays. Equilibrium stages are ideal steps where compositions achieve vapor–liquid equilibrium, repeating the separation process and allowing better separation given a reflux ratio. A column with a high reflux ratio may have fewer stages, but it refluxes a large amount of liquid, giving

3976-454: Is also referred to as rectification. As the solution to be purified is heated, its vapors rise to the fractionating column . As it rises, it cools, condensing on the condenser walls and the surfaces of the packing material. Here, the condensate continues to be heated by the rising hot vapors; it vaporizes once more. However, the composition of the fresh vapors is determined once again by Raoult's law. Each vaporization-condensation cycle (called

4118-486: Is heated, the vapor pressure of each component will rise, thus causing the total vapor pressure to rise. When the total vapor pressure reaches the pressure surrounding the liquid, boiling occurs and liquid turns to gas throughout the bulk of the liquid. A mixture with a given composition has one boiling point at a given pressure when the components are mutually soluble. A mixture of constant composition does not have multiple boiling points. An implication of one boiling point

4260-664: Is known from other provinces of the empire, and little evidence exists of the military practices of the prefect and his officers. Most papyri have been found in Middle Egypt 's villages, and the texts are primarily concerned with local affairs, rarely giving space to high politics and military matters. Not much is known about the military encampments of the Roman imperial period , since many are underwater or have been built over and because Egyptian archaeology has traditionally taken little interest in Roman sites. Because they supply

4402-581: Is not known precisely when it was withdrawn from Egypt, though it was certainly before 23 AD, during the reign of Tiberius ( r.  14–37 ). In the reign of Tiberius's step-father and predecessor Augustus, the legions had been stationed at Nicopolis and at Egyptian Babylon, and perhaps at Thebes . After August 119, the III Cyrenaica was ordered out of Egypt; the XXII Deiotariana was transferred sometime afterwards, and before 127/8,

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4544-414: Is that lighter components never cleanly "boil first". At boiling point, all volatile components boil, but for a component, its percentage in the vapor is the same as its percentage of the total vapor pressure. Lighter components have a higher partial pressure and, thus, are concentrated in the vapor, but heavier volatile components also have a (smaller) partial pressure and necessarily vaporize also, albeit at

4686-464: Is unknown, although estimates vary from 4 to 8 million . Alexandria , its capital, was the largest port and second largest city of the Roman Empire. Three Roman legions garrisoned Egypt in the early Roman imperial period , with the garrison later reduced to two, alongside auxilia formations of the Roman army . The major town of each nome (administrative region) was known as

4828-399: Is when the vapor phase and liquid phase contain the same composition. Although there are computational methods that can be used to estimate the behavior of a mixture of arbitrary components, the only way to obtain accurate vapor–liquid equilibrium data is by measurement. It is not possible to completely purify a mixture of components by distillation, as this would require each component in

4970-527: The strategoi , but each reported directly to Alexandria, where dedicated financial secretaries – appointed for each individual nome – oversaw the accounts: an eklogistes and a graphon ton nomon . The eklogistes was responsible for general financial affairs while the graphon ton nomon likely dealt with matters relating to the Idios Logos . In 200/201, the emperor Septimius Severus ( r.  193–211 ) granted each metropolis, and

5112-460: The Idios Logos , responsible for special revenues like the proceeds of bona caduca property, and the iuridicus (Koinē Greek: δικαιοδότης , romanized:  dikaiodotes , lit.   'giver of laws'), the senior legal official, were both imperially appointed. From the reign of Hadrian ( r.  117–138 ), the financial powers of the prefect and the control of

5254-656: The Legio II Traiana arrived, to remain as the main component of the Army of Egypt for two centuries. After some fluctuations in the size and positions of the auxilia garrison in the early decades of Roman Egypt, relating to the conquest and pacification of the country, the auxilia contingent was mostly stable during the Principate , increasing somewhat towards the end of the 2nd century, and with some individual formations remaining in Egypt for centuries at

5396-571: The canabae settlements surrounding the army's base at Nicopolis, while only about one eighth were Alexandrian citizens. Egyptians were given Roman-style Latin names on joining the army; unlike in other provinces, indigenous names are nearly unknown among the local soldiers of the Army of Egypt. One of the surviving military diplomas lists the soldier's birthplace as Coptos , while others demonstrate that soldiers and centurions from elsewhere retired to Egypt: auxilia veterans from Chios and Hippo Regius (or Hippos ) are named. Evidence from

5538-532: The demos '), and cargo supervisors ( ἐπίπλοοι , epiploöi ). Other liturgical officials were responsible for other specific aspects of the economy: a suite of officials was each responsible for arranging supplies of particular necessity in the course of the prefect's official tours. The liturgy system extended to most aspects of Roman administration by the reign of Trajan ( r.  98–117 ), though constant efforts were made by people eligible for such duties to escape their imposition. The reforms of

5680-633: The Ancient Egyptian deities and Hellenistic religions of Egypt kept most of their temples and privileges, and in turn the priests also served the Roman imperial cult of the deified emperors and their families. As Rome overtook the Ptolemaic system in place for areas of Egypt, they made many changes. The effect of the Roman conquest was at first to strengthen the position of the Greeks and of Hellenism against Egyptian influences. Some of

5822-784: The Christianization of the Roman Empire , especially the growth of Christianity in Egypt . After Constantine the Great gained control of Egypt in AD ;324, the emperors promoted Christianity. The Coptic language , derived from earlier forms of Egyptian, emerged among the Christians of Roman Egypt. Under Diocletian the frontier was moved downriver to the First Cataract of the Nile at Syene ( Aswan ), withdrawing from

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5964-580: The Coptos – Myos Hormos road and at the imperial granite quarry at Mons Claudianus . Another Roman outpost, known from an inscription, existed on Farasan , the chief island of the Red Sea 's Farasan Islands off the west coast of the Arabian Peninsula . As in other provinces, many of the Roman soldiers in Egypt were recruited locally, not only among the non-citizen auxilia , but among

6106-630: The Crisis of the Third Century , Roman Egypt fell under the control of the breakaway Palmyrene Empire after an invasion of Egypt by Zenobia in 269. The emperor Aurelian ( r.  270–275 ) successfully besieged Alexandria and recovered Egypt. The usurpers Domitius Domitianus and Achilleus took control of the province in opposition to emperor Diocletian ( r.  284–305 ), who recovered it in 297–298. Diocletian then introduced administrative and economic reforms. These coincided with

6248-577: The Dodekaschoinos region. This southern frontier was largely peaceful for many centuries, likely garrisoned by limitanei of the late Roman army . Regular units also served in Egypt, including Scythians known to have been stationed in the Thebaid by Justinian the Great ( r.  527–565 ). Constantine introduced the gold solidus coin , which stabilized the economy. The trend towards private ownership of land became more pronounced in

6390-468: The Egyptian temples and priesthoods was devolved to other procurators, a dioiketes ( διοικητής ), the chief financial officer, and an archiereus ( ἀρχιερεύς , 'archpriest'). A procurator could deputize as the prefect's representative where necessary. Procurators were also appointed from among the freedmen ( manumitted slaves) of the imperial household , including the powerful procurator usiacus , responsible for state property in

6532-495: The Ptolemaic period , but the development of a much more complex and sophisticated taxation system was a hallmark of Roman rule. Taxes in both cash and kind were assessed on land, and a bewildering variety of small taxes in cash, as well as customs dues and the like, was collected by appointed officials. A massive amount of Aegyptus' grain was shipped downriver (north) both to feed the population of Alexandria and for export to

6674-409: The Roman calendar . Evidence exists of more than 60 edicts issued by the Roman governors of Egypt. To the government at Alexandria besides the prefect of Egypt, the Roman emperors appointed several other subordinate procurators for the province, all of equestrian rank and, at least from the reign of Commodus ( r.  176–192 ) of similar, "ducenarian" salary bracket. The administrator of

6816-461: The Roman pharaoh . The Ptolemaic institutions were dismantled: the government administration was wholly reformed, as was the social structure, though some bureaucratic elements were maintained. The Graeco-Egyptian legal system of the Hellenistic period continued in use, but within the bounds of Roman law . The tetradrachm coinage minted at the Ptolemaic capital of Alexandria continued to be

6958-642: The Wars of Alexander the Great that overthrew Achaemenid Egypt . The Ptolemaic pharaoh Cleopatra VII sided with Julius Caesar during Caesar's Civil War (49–45 BC) and Caesar's subsequent Roman dictatorship . After Caesar's assassination in 44 BC, Cleopatra aligned Egypt with Mark Antony , the Roman triumvir who controlled the eastern Mediterranean. In the last war of the Roman Republic (32–30 BC), Antony (with Cleopatra's support) fought against Octavian . The decisive naval Battle of Actium

7100-536: The augustus himself: his fairness ( aequitas , 'equality') and his foresight ( providentia , 'providence'). From the early 2nd century, service as the governor of Egypt was frequently the penultimate stage in the career of a praetorian prefect. The governor's powers as prefect, which included the rights to make edicts ( ius edicendi ) and, as the supreme judicial authority, to order capital punishment ( ius gladii , 'right of swords '), expired as soon as his successor arrived in

7242-427: The condensation of the vapors in a still . Dry distillation ( thermolysis and pyrolysis ) is the heating of solid materials to produce gases that condense either into fluid products or into solid products. The term dry distillation includes the separation processes of destructive distillation and of chemical cracking , breaking down large hydrocarbon molecules into smaller hydrocarbon molecules. Moreover,

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7384-690: The legions and cohorts , for the organization of finance and taxation, and for the administration of justice. The Egyptian provinces of the Ptolemaic Kingdom remained wholly under Roman rule until the administrative reforms of the augustus Diocletian ( r.  284–305 ). In these first three centuries of Roman Egypt, the whole country came under the central Roman control of single governor, officially called in Latin : praefectus Alexandreae et Aegypti , lit.   'prefect of Alexandria and Egypt' and more usually referred to as

7526-407: The vapor pressure of the liquid equals the pressure around the liquid, enabling bubbles to form without being crushed. A special case is the normal boiling point , where the vapor pressure of the liquid equals the ambient atmospheric pressure . It is a misconception that in a liquid mixture at a given pressure, each component boils at the boiling point corresponding to the given pressure, allowing

7668-512: The 12th century. Distilled beverages were common during the Yuan dynasty (13th–14th century). In 1500, German alchemist Hieronymus Brunschwig published Liber de arte distillandi de simplicibus ( The Book of the Art of Distillation out of Simple Ingredients ), the first book solely dedicated to the subject of distillation, followed in 1512 by a much expanded version. Right after that, in 1518,

7810-604: The 1st century CE. Distilled water has been in use since at least c.  200 CE , when Alexander of Aphrodisias described the process. Work on distilling other liquids continued in early Byzantine Egypt under Zosimus of Panopolis in the 3rd century. Distillation was practiced in the ancient Indian subcontinent , which is evident from baked clay retorts and receivers found at Taxila , Shaikhan Dheri , and Charsadda in Pakistan and Rang Mahal in India dating to

7952-494: The 28th book of al-Zahrāwī 's (Latin: Abulcasis, 936–1013) Kitāb al-Taṣrīf (later translated into Latin as Liber servatoris ). In the twelfth century, recipes for the production of aqua ardens ("burning water", i.e., ethanol) by distilling wine with salt started to appear in a number of Latin works, and by the end of the thirteenth century it had become a widely known substance among Western European chemists. The works of Taddeo Alderotti (1223–1296) describe

8094-665: The 2nd century suggests most auxilia came from Egypt, with others drawn from the provinces of Africa and Syria , and from Roman Asia Minor . Auxilia from the Balkans, who served throughout the Roman army, also served in Egypt: many Dacian names are known from ostraca in the Trajanic period, perhaps connected with the recruitment of Dacians during and after Trajan's Dacian Wars ; they are predominantly cavalrymen's names, with some infantrymen's. Thracians , common in

8236-667: The 5th century and peaked in the 6th century, with large estates built up from many individual plots. Some large estates were owned by Christian churches, and smaller land-holders included those who were themselves both tenant farmers on larger estates and landlords of tenant-farmers working their own land. The First Plague Pandemic arrived in the Mediterranean Basin with the emergence of the Justinianic Plague at Pelusium in Roman Egypt in 541. Egypt

8378-594: The Army of Egypt was the Nicopolis garrison at Alexandria, with at least one legion permanently stationed there, along with a strong force of auxilia cavalry. These troops would both guard the residence of the praefectus Aegypti against uprisings among the Alexandrians and were poised to march quickly to any point at the prefect's command. At Alexandria too was the Classis Alexandrina ,

8520-515: The Egyptian monarchy. The division between the rural life of the villages, where the Egyptian language was spoken, and the metropolis, where the citizens spoke Koine Greek and frequented the Hellenistic gymnasia , was the most significant cultural division in Roman Egypt, and was not dissolved by the Constitutio Antoniniana of 212, which made all free Egyptians Roman citizens. There

8662-451: The Egyptian population. Within the citizenry, there were gymnasiums that Greek citizens could enter if they showed that both parents were members of the gymnasium based on a list that was compiled by the government in 4–5 AD. The candidate for the gymnasium would then be let into the ephebus . There was also the council of elders known as the gerousia . This council of elders did not have a boulai to answer to. All of this Greek organization

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8804-750: The Elder , was "never used in our sense". Aristotle knew that water condensing from evaporating seawater is fresh: I have proved by experiment that salt water evaporated forms fresh, and the vapour does not, when it condenses, condense into sea water again. Letting seawater evaporate and condense into freshwater can not be called "distillation" for distillation involves boiling, but the experiment may have been an important step towards distillation. Early evidence of distillation has been found related to alchemists working in Alexandria in Roman Egypt in

8946-589: The Greek cities in Egypt, it is clear that the other Greek cities, such as Antinoöpolis, enjoyed privileges very similar to the ones seen in Alexandria; for instance, like Alexandrians, Antinoöpolites were exempted from paying poll-taxes. All of these changes amounted to the Greeks being treated as an ally in Egypt and the native Egyptians were treated as a conquered race. The Gnomon of the Idios Logos shows

9088-612: The Hellenistic-Egyptian god Serapis (under the name ϹΑΡΑΠΟ , "Sarapo"). Since Serapis was the supreme deity of the pantheon of Alexandria in Egypt , this coin suggests that Huvishka had as strong orientation towards Roman Egypt, which may have been an important market for the products coming from the Kushan Empire. In the administrative provincial capitals of the nomoi , the mētropoleis mostly inherited from

9230-565: The Latin: praefectus Aegypti , lit.   'prefect of Egypt' or the Koinē Greek : ἔπαρχος Αἰγύπτου , romanized:  eparchos Aigyptou , lit.   ' Eparch of Egypt'. The double title of the governor as prefect "of Alexandria and Egypt" reflects the distinctions between Upper and Lower Egypt and Alexandria, since Alexandria, outside the Nile Delta ,

9372-542: The Nile Valley, but about their duties little is known, as little evidence survives, though they were, in addition to the strategoi of the nomoi , the prime local representatives of the Roman state. Archaeological work led by Hélène Cuvigny has revealed many ostraca (inscribed ceramic fragments) which give unprecedently detailed information on the lives of soldiers stationed in the Eastern Desert along

9514-534: The Pharaonic and Ptolemaic period, Roman public buildings were erected by the governing strategos and the local gymnasiarch . In most cases, these have not survived and evidence of them is rare, but it is probable that most were built in the classical architecture of the Graeco-Roman world, employing the classical orders in stone buildings. Prominent remains include two Roman theatres at Pelusium ,

9656-406: The Roman capital. There were frequent complaints of oppression and extortion from the taxpayers. For land management and tenure, the Ptolemaic state had retained much of the categorization of land as under the earlier pharaohs, but the Roman Empire introduced a distinction between private and public lands – the earlier system had categorized little land as private property – and a complex arrangement

9798-728: The Romans was both unique and complicated. On the one hand, the Romans continued to use many of the same organizational tactics that were in place under the leaders of the Ptolemaic period. At the same time, the Romans saw the Greeks in Aegyptus as "Egyptians", an idea that both the native Egyptians and Greeks would have rejected. To further compound the whole situation, Jews, who themselves were very Hellenized overall, had their own communities, separate from both Greeks and native Egyptians. Most inhabitants were peasants, many working as tenant-farmers for high rents in kind, cultivating sacred land belonging to temples or public land formerly belonging to

9940-618: The army in other Roman provinces, were also present, and an auxiliary diploma from the Egyptian garrison has been found in Thracia . Two auxilia diplomas connect Army of Egypt veterans with Syria, including one naming Apamea . Large numbers of recruits mustered in Asia Minor may have supplemented the garrison after the Diaspora Revolt , a Jewish uprising in Egypt, Libya and Cyprus. The social structure in Aegyptus under

10082-449: The auxiliary forces and attain citizenship upon discharge. The different groups had different rates of taxation based on their social class. Roman citizens and citizens of Alexandria were exempted from the poll tax . Hellenized inhabitants of the nome capitals paid a low rate of poll tax, while native Egyptians paid a higher rate. Native Egyptians were barred from serving in the army, and there were other defined legal distinctions between

10224-423: The boiling flask 2 is heated by a combined hotplate and magnetic stirrer 13 via a silicone oil bath (orange, 14). The vapor flows through a short Vigreux column 3, then through a Liebig condenser 5, is cooled by water (blue) that circulates through ports 6 and 7. The condensed liquid drips into the receiving flask 8, sitting in a cooling bath (blue, 16). The adapter 10 has a connection 9 that may be fitted to

10366-430: The boiling point of the mixture to rise, which results in a rise in the temperature in the vapor, which results in a changing ratio of A : B in the gas phase (as distillation continues, there is an increasing proportion of B in the gas phase). This results in a slowly changing ratio of A : B in the distillate. If the difference in vapour pressure between the two components A and B is large – generally expressed as

10508-400: The city of Alexandria, a boulē (a Hellenistic town council). The nomoi were grouped traditionally into those of Upper and Lower Egypt, the two divisions each being known as an " epistrategy " after the chief officer, the epistrategos ( ἐπιστράτηγος , epistratēgós , 'over-general'), each of whom was also a Roman procurator. Soon after the Roman annexation, a new epistrategy

10650-489: The city, which was dedicated to the medjed , a sacred species of Mormyrus fish. Two groups of buildings survive at Heracleopolis Magna, sacred to Heracles / Hercules , which is otherwise known from Jomard's work, which also forms the mainstay of knowledge about the architecture of Antinoöpolis, founded by Hadrian in honour of his deified lover Antinous . The Napoleonic-era evidence is also important for documenting Hermopolis Magna, where more buildings survive and which

10792-438: The classes. Within the mētropoleis there was a Hellenic socio-political élite, an urban land-owning aristocracy that dominated Egypt by the 2nd and throughout the 3rd centuries through their large private estates. The social structure in Aegyptus is very closely linked to the governing administration. Elements of centralized rule that were derived from the Ptolemaic period lasted into the 4th century. One element in particular

10934-546: The coast of the Mediterranean and throughout the northern part of the country the churches were basilicas of three or five aisles, but in Middle Egypt and Upper Egypt the basilicas were often given a colonnade all the way around the structure, forming a continuous ambulatory by the addition of a transverse fourth aisle to the west of the other three. In eastern Egypt, the columns and colonnade were emphasized, and

11076-410: The composition of the source material, the vapors of the distilling compounds, and the distillate change during the distillation. In batch distillation, a still is charged (supplied) with a batch of feed mixture, which is then separated into its component fractions, which are collected sequentially from most volatile to less volatile, with the bottoms – remaining least or non-volatile fraction – removed at

11218-467: The connection between law and status. It lays out the revenues it deals with, mainly fines and confiscation of property, to which only a few groups were apt. The Gnomon also confirms that a freed slave takes his former master's social status. The Gnomon demonstrates the social controls that the Romans had in place through monetary means based on status and property. The economic resources that this imperial government existed to exploit had not changed since

11360-675: The count of the Orient (i.e. the vicar) of the diocese headquartered in Antioch in Syria. Emperor Justinian abolished the Diocese of Egypt in 538 and re-combined civil and military power in the hands of the dux with a civil deputy ( praeses ) as a counterweight to the power of the church authorities. All pretense of local autonomy had by then vanished. The presence of the soldiery was more noticeable, its power and influence more pervasive in

11502-449: The currency of an increasingly monetized economy, but its value was made equal to the Roman denarius . Augustus introduced land reforms that enabled wider entitlement to private ownership of land (previously rare under the Ptolemaic cleruchy system of allotments under royal ownership) and the local administration reformed into a Roman liturgical system, in which land-owners were required to serve in local government. The priesthoods of

11644-918: The development of accurate design methods, such as the McCabe–Thiele method by Ernest Thiele and the Fenske equation . The first industrial plant in the United States to use distillation as a means of ocean desalination opened in Freeport, Texas in 1961 with the hope of bringing water security to the region. The availability of powerful computers has allowed direct computer simulations of distillation columns. The application of distillation can roughly be divided into four groups: laboratory scale , industrial distillation , distillation of herbs for perfumery and medicinals ( herbal distillate ), and food processing . The latter two are distinctively different from

11786-434: The difference in boiling points – the mixture in the beginning of the distillation is highly enriched in component A, and when component A has distilled off, the boiling liquid is enriched in component B. Continuous distillation is an ongoing distillation in which a liquid mixture is continuously (without interruption) fed into the process and separated fractions are removed continuously as output streams occur over time during

11928-470: The distillation of various substances. The fractional distillation of organic substances plays an important role in the works attributed to Jābir, such as in the Kitāb al-Sabʿīn ('The Book of Seventy'), translated into Latin by Gerard of Cremona ( c.  1114–1187 ) under the title Liber de septuaginta . The Jabirian experiments with fractional distillation of animal and vegetable substances, and to

12070-478: The diverse set-up of various institutions that the Romans continued to use after their takeover of Egypt. Just as under the Ptolemies, Alexandria and its citizens had their own special designations. The capital city enjoyed a higher status and more privileges than the rest of Egypt. Just as it was under the Ptolemies, the primary way of becoming a citizen of Roman Alexandria was through showing when registering for

12212-403: The domestic production of flower water or essential oils . Early forms of distillation involved batch processes using one vaporization and one condensation. Purity was improved by further distillation of the condensate. Greater volumes were processed by simply repeating the distillation. Chemists reportedly carried out as many as 500 to 600 distillations in order to obtain a pure compound. In

12354-535: The early 19th century, the basics of modern techniques, including pre-heating and reflux , were developed. In 1822, Anthony Perrier developed one of the first continuous stills, and then, in 1826, Robert Stein improved that design to make his patent still . In 1830, Aeneas Coffey got a patent for improving the design even further. Coffey's continuous still may be regarded as the archetype of modern petrochemical units. The French engineer Armand Savalle developed his steam regulator around 1846. In 1877, Ernest Solvay

12496-400: The early 4th century had established the basis for another 250 years of comparative prosperity in Aegyptus, at a cost of perhaps greater rigidity and more oppressive state control. Aegyptus was subdivided for administrative purposes into a number of smaller provinces, and separate civil and military officials were established; the praeses and the dux . The province was under the supervision of

12638-742: The early centuries of the Common Era . Frank Raymond Allchin says these terracotta distill tubes were "made to imitate bamboo". These " Gandhara stills" were only capable of producing very weak liquor , as there was no efficient means of collecting the vapors at low heat. Distillation in China may have begun at the earliest during the Eastern Han dynasty (1st–2nd century CE). Medieval Muslim chemists such as Jābir ibn Ḥayyān (Latin: Geber, ninth century) and Abū Bakr al-Rāzī (Latin: Rhazes, c.  865–925 ) experimented extensively with

12780-404: The elites per aroura of land in tax-rates, and about 4–5 times more than Alexandrians per aroura of land in tax-rates. These privileges even extended to corporal punishments. Romans were protected from this type of punishment while native Egyptians were whipped. Alexandrians, on the other hand, had the privilege of merely being beaten with a rod. Although Alexandria enjoyed the greatest status of

12922-478: The emperor or to wealthy private landlords, and they were relatively much more heavily burdened by rentals, which tended to remain at a fairly high level. Overall, the degree of monetization and complexity in the economy, even at the village level, was intense. Goods were moved around and exchanged through the medium of coin on a large scale and, in the towns and the larger villages, a high level of industrial and commercial activity developed in close conjunction with

13064-418: The end. The still can then be recharged and the process repeated. In continuous distillation , the source materials, vapors, and distillate are kept at a constant composition by carefully replenishing the source material and removing fractions from both vapor and liquid in the system. This results in a more detailed control of the separation process. The boiling point of a liquid is the temperature at which

13206-404: The equestrian order, rather than, as in other provinces, a governor of the senatorial class. This distinction was stipulated in a law promulgated by Augustus, and, because it was unthinkable that an equestrian should command a senator, the commanders of the legions in Egypt were themselves, uniquely, of equestrian rank. As a result of these strictures, the governor was rendered unable to build up

13348-403: The evidence of these remains, because since the 19th century many of the ruins have themselves disappeared. South of Thebes, the mētropoleis may have been largely without classical buildings, but near Antinoöpolis the classical influence may have been stronger. Most mētropoleis were probably built on the classical Hippodamian grid employed by the Hellenistic polis , as at Alexandria, with

13490-451: The exploitation of the predominant agricultural base. The volume of trade, both internal and external, reached its peak in the 1st and 2nd centuries. By the end of the 3rd century, major problems were evident. A series of debasements of the imperial currency had undermined confidence in the coinage, and even the government itself was contributing to this by demanding more and more irregular tax payments in kind, which it channelled directly to

13632-448: The former two in that distillation is not used as a true purification method but more to transfer all volatiles from the source materials to the distillate in the processing of beverages and herbs. The main difference between laboratory scale distillation and industrial distillation are that laboratory scale distillation is often performed on a batch basis, whereas industrial distillation often occurs continuously. In batch distillation ,

13774-401: The government of the country in the prefect's name and were themselves drawn from the Egyptian upper classes. The strategoi in each of the mētropoleis were the senior local officials, served as intermediaries between the prefect and the villages, and were legally responsible for the administration and their own conduct while in office for several years. Each strategos was supplemented by

13916-529: The governors' engagements. Yearly in Lower Egypt , and once every two years in Upper Egypt , the praefectus Aegypti held a conventus (Koinē Greek: διαλογισμός , romanized:  dialogismos , lit.   'dialogue'), during which legal trials were conducted and administrative officials' practices were examined, usually between January ( Ianuarius ) and April ( Aprilis ) in

14058-417: The industrial applications of classical distillation, the term distillation is used as a unit of operation that identifies and denotes a process of physical separation, not a chemical reaction ; thus an industrial installation that produces distilled beverages , is a distillery of alcohol . These are some applications of the chemical separation process that is distillation: Early evidence of distillation

14200-533: The legionaries as well, who were required to have Roman citizenship. An increasing proportion of the Army of Egypt was of local origin in the reign of the Flavian dynasty , with an even higher proportion – as many as three quarters of legionaries – under the Severan dynasty . Of these, around one third were themselves the offspring (Latin: castrenses , lit.   'camp-men') of soldiers, raised in

14342-429: The liquid state , and a receiver in which the concentrated or purified liquid, called the distillate, is collected. Several laboratory scale techniques for distillation exist (see also distillation types ). A completely sealed distillation apparatus could experience extreme and rapidly varying internal pressure, which could cause it to burst open at the joints. Therefore, some path is usually left open (for instance, at

14484-499: The liturgical focus at the east, and the pastaphoria (side-rooms) were a common mark of churches in the country. Churches were built quickly after the victory of Constantine over Licinius, and in the 4th century even towns like ‘Ain el-Gedida in the Dakhla Oasis had their own churches. The earliest known monumental basilica of which remains survive is that at Antinoöpolis; a five-aisled, apsed basilica facing east and set in

14626-453: The lowest class. In between those classes was the metropolite, who was almost certainly of Hellenic origin. Gaining citizenship and moving up in ranks was very difficult and there were not many available options for ascendancy. One of the routes that many followed to ascend to another caste was through enlistment in the army. Although only Roman citizens could serve in the legions, many Greeks found their way in. The native Egyptians could join

14768-514: The main consumers, the army personnel. Local administration by the councils was careless, recalcitrant, and inefficient; the evident need for firm and purposeful reform had to be squarely faced in the reigns of Diocletian and Constantine I . There are numerous indications of Roman trade with India during the period, particularly between Roman Egypt and the Indian subcontinent. Kushan Empire ruler Huvishka (150–180 CE) incorporated in his coins

14910-411: The mixture to have a zero partial pressure . If ultra-pure products are the goal, then further chemical separation must be applied. When a binary mixture is vaporized and the other component, e.g., a salt, has zero partial pressure for practical purposes, the process is simpler. Heating an ideal mixture of two volatile substances, A and B, with A having the higher volatility, or lower boiling point, in

15052-411: The more volatile compound, A (due to Raoult's Law, see above). The vapor goes through the condenser and is removed from the system. This, in turn, means that the ratio of compounds in the remaining liquid is now different from the initial ratio (i.e., more enriched in B than in the starting liquid). The result is that the ratio in the liquid mixture is changing, becoming richer in component B. This causes

15194-572: The names of persons due to perform unpaid public service as part of the liturgy system. They were required to be literate and had various duties as official clerks. Other local officials drawn from the liturgy system served for a year in their home kome ; they included the practor ( πράκτωρ , práktōr , 'executor'), who collected certain taxes, as well as security officers, granary officials ( σιτολόγοι , sitologoi , 'grain collectors'), public cattle drivers ( δημόσιοι kτηνοτρόφοι , dēmósioi ktēnotróphoi , 'cattleherds of

15336-462: The oldest surviving distillery in Europe, The Green Tree Distillery , was founded. In 1651, John French published The Art of Distillation , the first major English compendium on the practice, but it has been claimed that much of it derives from Brunschwig's work. This includes diagrams with people in them showing the industrial rather than bench scale of the operation. As alchemy evolved into

15478-507: The only surviving information beyond the names of the offices is a few names of the incumbents. In general, the central provincial administration of Egypt is no better-known than the Roman governments of other provinces, since, unlike in the rest of Egypt, the conditions for the preservation of official papyri were very unfavourable at Alexandria. Local government in the hinterland (Koinē Greek: χώρα , romanized:  khṓrā , lit.   'countryside') outside Alexandria

15620-432: The operation. Continuous distillation produces a minimum of two output fractions, including at least one volatile distillate fraction, which has boiled and been separately captured as a vapor and then condensed to a liquid. There is always a bottoms (or residue) fraction, which is the least volatile residue that has not been separately captured as a condensed vapor. Continuous distillation differs from batch distillation in

15762-521: The previous offices and names of offices under the Hellenistic Ptolemaic rule were kept, some were changed, and some names would have remained but the function and administration would have changed. The Romans introduced important changes in the administrative system, aimed at achieving a high level of efficiency and maximizing revenue . The duties of the prefect of Aegyptus combined responsibility for military security through command of

15904-413: The principles are the same. Examples of laboratory-scale fractionating columns (in increasing efficiency) include: Laboratory scale distillations are almost exclusively run as batch distillations. The device used in distillation, sometimes referred to as a still , consists at a minimum of a reboiler or pot in which the source material is heated, a condenser in which the heated vapor is cooled back to

16046-459: The province. Other procurators were responsible for revenue farming of state monopolies (the procurator ad Mercurium ), oversight of farm lands (the procurator episkepseos ), of the warehouses of Alexandria (the procurator Neaspoleos ), and of exports and emigration (the procurator Phari , 'procurator of the Pharos '). These roles are poorly attested, with often

16188-414: The provincial capital at Alexandria, who then also took up overall command of the Roman legions of the Egyptian garrison. (Initially, three legions were stationed in Egypt, with only two from the reign of Tiberius ( r.  14–37 AD ).) The official duties of the praefectus Aegypti are well known because enough records survive to reconstruct a mostly complete official calendar ( fasti ) of

16330-623: The provincial fleet of the Roman Navy in Egypt. In the 2nd and 3rd centuries, there were around 8,000 soldiers at Alexandria, a fraction of the megalopolis 's huge population. Initially, the legionary garrison of Roman Egypt consisted of three legions: the Legio III Cyrenaica , the Legio XXII Deiotariana , and one other legion. The station and identity of this third legion is not known for sure, and it

16472-434: The receiving flask) to allow the internal pressure to equalize with atmospheric pressure. Alternatively, a vacuum pump may be used to keep the apparatus at a lower than atmospheric pressure. If the substances involved are air- or moisture-sensitive, the connection to the atmosphere can be made through one or more drying tubes packed with materials that scavenge the undesired air components, or through bubblers that provide

16614-428: The respect that concentrations should not change over time. Continuous distillation can be run at a steady state for an arbitrary amount of time. For any source material of specific composition, the main variables that affect the purity of products in continuous distillation are the reflux ratio and the number of theoretical equilibrium stages, in practice determined by the number of trays or the height of packing. Reflux

16756-474: The rising vapors into close contact with the descending condensate, increasing the number of theoretical plates. Byzantine Egypt Egypt was conquered by Roman forces in 30 BC and became a province of the new Roman Empire upon its formation in 27 BC. Egypt came to serve as a major producer of grain for the empire and had a highly developed urban economy. It was by far the wealthiest Roman province outside of Italy . The population of Roman Egypt

16898-439: The routine of town and village life. The Roman army was among the most homogenous Roman structures, and the organization of the army in Egypt differed little from its organization elsewhere in the Roman Empire. The Roman legions were recruited from Roman citizens and the Roman auxilia recruited from the non-citizen subjects. Egypt was unique in that its garrison was commanded by the praefectus Aegypti , an official of

17040-412: The science of chemistry , vessels called retorts became used for distillations. Both alembics and retorts are forms of glassware with long necks pointing to the side at a downward angle to act as air-cooled condensers to condense the distillate and let it drip downward for collection. Later, copper alembics were invented. Riveted joints were often kept tight by using various mixtures, for instance

17182-421: The solution and 2) the fraction of solution each component makes up, a.k.a. the mole fraction . This law applies to ideal solutions , or solutions that have different components but whose molecular interactions are the same as or very similar to pure solutions. Dalton's law states that the total pressure is the sum of the partial pressures of each individual component in the mixture. When a multi-component liquid

17324-623: The southern border, on the Nile's First Cataract around Philae and Syene ( Aswan ), protecting Egypt from enemies to the south and guarding against rebellion in the Thebaid . Besides the main garrison at Alexandrian Nicopolis and the southern border force, the disposition of the rest of the Army of Egypt is not clear, though many soldiers are known to have been stationed at various outposts ( praesidia ), including those defending roads and remote natural resources from attack. Roman detachments, centuriones , and beneficiarii maintained order in

17466-566: The state and forming most of its revenue; and the "gifted land" (Koinē Greek: γή εν δωρεά , romanized:  gḗ en dōreá , lit.   'land in gift'; Δωρεά , Dōreá , 'gifts') leased out under the cleruchy system. The Roman government had actively encouraged the privatization of land and the increase of private enterprise in manufacture, commerce, and trade, and low tax rates favored private owners and entrepreneurs. The poorer people gained their livelihood as tenants of state-owned land or of property belonging to

17608-456: The typical Roman pattern of the Cardo (north–south) and Decumanus Maximus (east–west) thoroughfares meeting at their centres, as at Athribis and Antinoöpolis. Vivant Denon made sketches of ruins at Oxyrhynchus, and Edme-François Jomard wrote a description; together with some historical photographs and the few surviving remains, these are the best evidence for the classical architecture of

17750-400: The vapors of each component to collect separately and purely. However, this does not occur, even in an idealized system. Idealized models of distillation are essentially governed by Raoult's law and Dalton's law and assume that vapor–liquid equilibria are attained. Raoult's law states that the vapor pressure of a solution is dependent on 1) the vapor pressure of each chemical component in

17892-474: Was a vital part of the metropolis and the Greek institutions provided an elite group of citizens. The Romans looked to these elites to provide municipal officers and well-educated administrators. These elites also paid lower poll-taxes than the local native Egyptians, fellahin . It is well documented that Alexandrians in particular were exempted from paying poll-taxes, and were able to enjoy lower tax-rates on land. Egyptian landholders paid about 3 times more than

18034-447: Was based on poros (property or income qualification), which was wholly based on social status and power. The Romans also introduced the poll tax which was similar to tax rates that the Ptolemies levied, but the Romans gave special low rates to citizens of mētropoleis . The city of Oxyrhynchus had many papyri remains that contain much information on the subject of social structure in these cities. This city, along with Alexandria, shows

18176-487: Was concentrated at Nicopolis, a district of Alexandria, rather than at the strategic heart of the country around Memphis and Egyptian Babylon . Alexandria was the Mediterranean's second city in the early Roman empire, the cultural capital of the Greek East and rival to Rome under Antony and Cleopatra. Because only a few papyri are preserved from the area, little more is known about the legionaries' everyday life than

18318-767: Was conquered by the Sasanian Empire in 618, who ruled the territory for a decade , but it was returned to the Eastern Roman Empire by the defection of the governor in 628. Egypt permanently ceased to be a part of the Roman Empire in 641, when it became part of the Rashidun Caliphate following the Muslim conquest of Egypt . The Ptolemaic Kingdom ( r.  305–30 BC , the Thirty-first Dynasty ) had ruled Egypt since

18460-412: Was considerable social mobility however, accompanying mass urbanization, and participation in the monetized economy and literacy in Greek by the peasant population was widespread. The Romans began a system of social hierarchy that revolved around ethnicity and place of residence. Other than Roman citizens, a Greek citizen of one of the Greek cities had the highest status, and a rural Egyptian would be in

18602-533: Was dedicated to the worship of Thoth , equated with Hermes / Mercury . The oldest known remains of church architecture in Egypt are at the Roman village of Kellis ; following the house church of the early 4th century, a three- aisled , apsed basilica church was built in the Constantinian period, with pastaphoria on either side, while a third church was accompanied by a Christian cemetery. All these churches were built on an east-west axis, with

18744-474: Was developed consisting of dozens of types of land-holding. Land's status was determined by the hydrological, juridical, and function of the property, as well as by the three main categories of ownership held over from the Ptolemaic system: the sacred property belonging to the temples (Koinē Greek: Ἱερά γη , romanized:  Hierā́ gē , lit.   'holy land'); the royal land ( Βασιλική γη , Basilikḗ gē , 'royal land') belonging to

18886-482: Was divided into traditional regions known as nomoi . The mētropoleis were governed by magistrates drawn from the liturgy system; these magistrates, as in other Roman cities, practised euergetism and built public buildings. To each nome the prefect appointed a strategos (Koinē Greek: στρατηγός , romanized:  stratēgós , lit.   'general'); the strategoi were civilian administrators, without military functions, who performed much of

19028-663: Was formed, encompassing the area just south of Memphis and the Faiyum region and named "the Heptanomia and the Arsinoite nome". In the Nile Delta however, power was wielded by two of the epistrategoi . The epistrategos 's role was mainly to mediate between the prefect in Alexandria and the strategoi in the mētropoleis , and they had few specific administrative duties, performing a more general function. Their salary

19170-501: Was found on Akkadian tablets dated c.  1200 BCE describing perfumery operations. The tablets provided textual evidence that an early, primitive form of distillation was known to the Babylonians of ancient Mesopotamia . According to British chemist T. Fairley, neither the Greeks nor the Romans had any term for the modern concept of distillation. Words like "distill" would have referred to something else, in most cases

19312-400: Was granted a U.S. Patent for a tray column for ammonia distillation, and the same and subsequent years saw developments in this theme for oils and spirits. With the emergence of chemical engineering as a discipline at the end of the 19th century, scientific rather than empirical methods could be applied. The developing petroleum industry in the early 20th century provided the impetus for

19454-484: Was not within the then-prevailing traditional geographic boundaries of Egypt. From the 1st century BC, the Roman governor of Egypt was appointed by the emperor for a multi-year term and given the rank of prefect ( Latin : praefectus ). Both the governor and the major officials were of equestrian rank (unlike other Roman provinces, which had governors of senatorial rank). The prefect of Egypt had more or less equivalent civil and military powers ( imperium ) to

19596-431: Was sexagenarian – 60,000 sesterces annually. Each village or kome ( κώμη , kṓmē ) was served by a village scribe ( κωμογραμματεύς , kōmogrammateús , 'secretary of the kome '), whose term, possibly paid, was usually held for three years. Each, to avoid conflicts of interest, was appointed to a community away from their home village, as they were required to inform the strategoi and epistrategoi of

19738-576: Was styled in Latin: praefectus stratopedarches , from the Greek: στρατοπεδάρχης , romanized:  stratopedárchēs , lit.   'camp commander', or as Latin: praefectus exercitu qui est in Aegypto , lit.   'prefect of the army in Egypt';. Collectively, these forces were known as the exercitus Aegyptiacus , 'Army of Egypt'. The Roman garrison

19880-443: Was the appointment of strategoi to govern the ' nomes ', the traditional administrative divisions of Egypt. Boulai , or town councils, in Egypt were only formally constituted by Septimius Severus . It was only under Diocletian later in the 3rd century that these boulai and their officers acquired important administrative responsibilities for their nomes. The Augustan takeover introduced a system of compulsory public service, which

20022-449: Was the second-highest office available to the equestrian class on the cursus honorum (after that of the praetorian prefect (Latin: praefectus praetorio ), the commander of the imperial Praetorian Guard ) and one of the highest-paid, receiving an annual salary of 200,000 sesterces (a "ducenarian" post). The prefect was appointed at the emperor's discretion; officially the governors' status and responsibilities mirrored those of

20164-539: Was won by Octavian, who then invaded Egypt. Following the Battle of Alexandria the defeated Antony and Cleopatra killed themselves. The Ptolemaic Kingdom of Egypt ceased to exist; Egypt was seized by Octavian as his personal possession. The legal status was settled in 27 BC, when Octavian was granted the honorific name of Augustus and Egypt became an imperial province of the newly established Roman empire . Augustus (and succeeding Roman emperors ) ruled Egypt as

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