92-549: The Visalia Electric Railroad , a wholly owned subsidiary of the Southern Pacific Railroad (SP), began as an electric interurban railroad in Tulare County , in the U.S. State of California . The railroad was incorporated on April 22, 1904. Passenger service was discontinued in 1924, and the electrification was removed in 1944. Subsequent operation was by diesel locomotive . The railroad
184-579: A Gilman reagent . These can undergo substitution with alkyl halides to form coupling products ; as such, they are important in the field of organic synthesis . Copper(I) acetylide is highly shock-sensitive but is an intermediate in reactions such as the Cadiot–Chodkiewicz coupling and the Sonogashira coupling . Conjugate addition to enones and carbocupration of alkynes can also be achieved with organocopper compounds. Copper(I) forms
276-696: A covalent character and are relatively weak. This observation explains the low hardness and high ductility of single crystals of copper. At the macroscopic scale, introduction of extended defects to the crystal lattice , such as grain boundaries, hinders flow of the material under applied stress, thereby increasing its hardness. For this reason, copper is usually supplied in a fine-grained polycrystalline form, which has greater strength than monocrystalline forms. The softness of copper partly explains its high electrical conductivity ( 59.6 × 10 S /m ) and high thermal conductivity, second highest (second only to silver) among pure metals at room temperature. This
368-643: A nickel ) consists of 75% copper and 25% nickel in homogeneous composition. Prior to the introduction of cupronickel, which was widely adopted by countries in the latter half of the 20th century, alloys of copper and silver were also used, with the United States using an alloy of 90% silver and 10% copper until 1965, when circulating silver was removed from all coins with the exception of the half dollar—these were debased to an alloy of 40% silver and 60% copper between 1965 and 1970. The alloy of 90% copper and 10% nickel, remarkable for its resistance to corrosion,
460-407: A pinkish-orange color . Copper is used as a conductor of heat and electricity, as a building material , and as a constituent of various metal alloys , such as sterling silver used in jewelry , cupronickel used to make marine hardware and coins , and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in
552-425: A spin of 3 ⁄ 2 . The other isotopes are radioactive , with the most stable being Cu with a half-life of 61.83 hours. Seven metastable isomers have been characterized; Cu is the longest-lived with a half-life of 3.8 minutes. Isotopes with a mass number above 64 decay by β , whereas those with a mass number below 64 decay by β . Cu , which has
644-638: A better choice for propulsion. The copper wires were immediately removed and salvaged to meet wartime copper demands. Two GE 44-ton switchers in Southern Pacific's tiger-stripe paint scheme lettered Visalia Electric and numbered 501 and 502 began handling the freight trains in September 1945. The GE locomotives were replaced by a variety of Southern Pacific ALCO switchers from 1971 to 1980. Southern Pacific EMD SW900s numbered 1196 and 1197 took over in 1980, and were replaced by EMD GP9s for
736-399: A blast furnace. A potential source of copper is polymetallic nodules, which have an estimated concentration 1.3%. Like aluminium , copper is recyclable without any loss of quality, both from raw state and from manufactured products. In volume, copper is the third most recycled metal after iron and aluminium. An estimated 80% of all copper ever mined is still in use today. According to
828-464: A blue crystalline penta hydrate , the most familiar copper compound in the laboratory. It is used in a fungicide called the Bordeaux mixture . Polyols , compounds containing more than one alcohol functional group , generally interact with cupric salts. For example, copper salts are used to test for reducing sugars . Specifically, using Benedict's reagent and Fehling's solution the presence of
920-571: A brand new EMD SD70ACe locomotive, Union Pacific 1996 , as part of a new heritage program. It was the final unit in UP's Heritage Series of locomotives, and was painted in a color scheme inspired by the "Daylight" and "Black Widow" schemes. Copper Copper is a chemical element ; it has symbol Cu (from Latin cuprum ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity . A freshly exposed surface of pure copper has
1012-709: A directly usable metallic form ( native metals ). This led to very early human use in several regions, from c. 8000 BC . Thousands of years later, it was the first metal to be smelted from sulfide ores, c. 5000 BC ; the first metal to be cast into a shape in a mold, c. 4000 BC ; and the first metal to be purposely alloyed with another metal, tin , to create bronze , c. 3500 BC . Commonly encountered compounds are copper(II) salts, which often impart blue or green colors to such minerals as azurite , malachite , and turquoise , and have been used widely and historically as pigments. Copper used in buildings, usually for roofing, oxidizes to form
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#17328020655371104-457: A green patina of compounds called verdigris . Copper is sometimes used in decorative art , both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents , fungicides , and wood preservatives . Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase . In molluscs and crustaceans , copper
1196-505: A half-life of 12.7 hours, decays both ways. Cu and Cu have significant applications. Cu is used in Cu Cu-PTSM as a radioactive tracer for positron emission tomography . Copper is produced in massive stars and is present in the Earth's crust in a proportion of about 50 parts per million (ppm). In nature, copper occurs in
1288-667: A land holding company. The last incarnation of the Southern Pacific, the Southern Pacific Transportation Company, was founded in 1969 and assumed control of the Southern Pacific system. The Southern Pacific Transportation Company was acquired in 1996 by the Union Pacific Corporation and merged with their Union Pacific Railroad . The Southern Pacific legacy founded hospitals in San Francisco , Tucson , and Houston . In
1380-687: A layer of brown-black copper oxide which, unlike the rust that forms on iron in moist air, protects the underlying metal from further corrosion ( passivation ). A green layer of verdigris (copper carbonate) can often be seen on old copper structures, such as the roofing of many older buildings and the Statue of Liberty . Copper tarnishes when exposed to some sulfur compounds, with which it reacts to form various copper sulfides . There are 29 isotopes of copper. Cu and Cu are stable, with Cu comprising approximately 69% of naturally occurring copper; both have
1472-574: A line that ran 10 miles from Chowchilla southwest to Dairyland from 1924 to 1928. It was sold to the Southern Pacific in 1936. The San Jose District of the Visalia Electric Railroad was formerly part of the Peninsular Railway , which consisted mainly of spur lines to Bascome, Linda Vista, & Berryessa. The Visalia Electric operated it from 1934 to 1938. The Fresno Traction Company ran 3.5 miles (5.6 km) in
1564-532: A natural color other than gray or silver. Pure copper is orange-red and acquires a reddish tarnish when exposed to air. This is due to the low plasma frequency of the metal, which lies in the red part of the visible spectrum, causing it to absorb the higher-frequency green and blue colors. As with other metals, if copper is put in contact with another metal in the presence of an electrolyte , galvanic corrosion will occur. Copper does not react with water, but it does slowly react with atmospheric oxygen to form
1656-667: A new depot was built on the block just west, the second block north and the second block east of the center of town (Court and Main Streets). The stations served both the Southern Pacific and the Visalia Electric. In 1907 and 1908, offices, the main substation, a carbarn, and a rail yard were built in Exeter to serve as the operations center of the railroad. In 1909 the line was extended from Citro Junction, just north of Lemon Cove, west through what became Woodlake to Redbanks with
1748-473: A passenger train and send scores and hundreds to instant death. There are many Southern Pacific locomotives still in revenue service with railroads such as the Union Pacific Railroad , and many older and special locomotives have been donated to parks and museums, or continue operating on scenic or tourist railroads. Most of the engines now in use with Union Pacific have been "patched", where
1840-407: A red-brown precipitate with copper(II) salts. Compounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry . They are synthesized by treating copper(I) compounds with Grignard reagents , terminal alkynes or organolithium reagents ; in particular, the last reaction described produces
1932-451: A rich variety of compounds, usually with oxidation states +1 and +2, which are often called cuprous and cupric , respectively. Copper compounds promote or catalyse numerous chemical and biological processes. As with other elements, the simplest compounds of copper are binary compounds, i.e. those containing only two elements, the principal examples being oxides, sulfides, and halides . Both cuprous and cupric oxides are known. Among
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#17328020655372024-422: A spur north to Elderwood. This rail termination was the gateway to Sequoia National Park. By 1912 the timetable included 23 daily passenger trains through Exeter. The line was extended from Exeter to Strathmore in 1916–1918. This part of the line was not electrified, but used two 64-ton, 350 hp (260 kW) General Electric model GES gas-electric locomotives numbered 401 and 402 built for Southern Pacific as
2116-453: A total distance of 29.0 miles (46.7 km). The line had two major spurs: 1.4 miles (2.3 km) from Citro Junction to Terminus and 4.5 miles (7.2 km) from Woodlake Junction to Elderwood. The second main line, non-electrified, extended south 17.877 miles (28.770 km) from Exeter to Strathmore. The Visalia Electric Railroad also operated three fragmentary lines in the early Twentieth Century: The Chowchilla Pacific Railway operated
2208-424: A variety of minerals, including native copper , copper sulfides such as chalcopyrite , bornite , digenite , covellite , and chalcocite , copper sulfosalts such as tetrahedite-tennantite , and enargite , copper carbonates such as azurite and malachite , and as copper(I) or copper(II) oxides such as cuprite and tenorite , respectively. The largest mass of elemental copper discovered weighed 420 tonnes and
2300-436: A variety of weak complexes with alkenes and carbon monoxide , especially in the presence of amine ligands. Copper(III) is most often found in oxides. A simple example is potassium cuprate , KCuO 2 , a blue-black solid. The most extensively studied copper(III) compounds are the cuprate superconductors . Yttrium barium copper oxide (YBa 2 Cu 3 O 7 ) consists of both Cu(II) and Cu(III) centres. Like oxide, fluoride
2392-583: Is a constituent of the blood pigment hemocyanin , replaced by the iron-complexed hemoglobin in fish and other vertebrates . In humans, copper is found mainly in the liver, muscle, and bone. The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. In the Roman era , copper was mined principally on Cyprus , the origin of the name of the metal, from aes cyprium (metal of Cyprus), later corrupted to cuprum (Latin). Coper ( Old English ) and copper were derived from this,
2484-405: Is a highly basic anion and is known to stabilize metal ions in high oxidation states. Both copper(III) and even copper(IV) fluorides are known, K 3 CuF 6 and Cs 2 CuF 6 , respectively. Some copper proteins form oxo complexes , which, in extensively studied synthetic analog systems, feature copper(III). With tetrapeptides , purple-colored copper(III) complexes are stabilized by
2576-401: Is because the resistivity to electron transport in metals at room temperature originates primarily from scattering of electrons on thermal vibrations of the lattice, which are relatively weak in a soft metal. The maximum possible current density of copper in open air is approximately 3.1 × 10 A/m , above which it begins to heat excessively. Copper is one of a few metallic elements with
2668-533: Is melted in a furnace and then reduced and cast into billets and ingots ; lower-purity scrap is refined by electroplating in a bath of sulfuric acid . The environmental cost of copper mining was estimated at 3.7 kg CO2eq per kg of copper in 2019. Codelco, a major producer in Chile, reported that in 2020 the company emitted 2.8t CO2eq per ton (2.8 kg CO2eq per kg) of fine copper. Greenhouse gas emissions primarily arise from electricity consumed by
2760-444: Is one of the most important constituents of silver and karat gold solders used in the jewelry industry, modifying the color, hardness and melting point of the resulting alloys. Some lead-free solders consist of tin alloyed with a small proportion of copper and other metals. The alloy of copper and nickel , called cupronickel , is used in low-denomination coins, often for the outer cladding. The US five-cent coin (currently called
2852-437: Is recovered from mine tailings and heaps. A variety of methods are used including leaching with sulfuric acid, ammonia, ferric chloride. Biological methods are also used. A significant source of copper is from recycling. Recycling is facilitated because copper is usually deployed in its metallic state. In 2001, a typical automobile contained 20–30 kg of copper. Recycling usually begins with some melting process using
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2944-411: Is used for various objects exposed to seawater, though it is vulnerable to the sulfides sometimes found in polluted harbors and estuaries. Alloys of copper with aluminium (about 7%) have a golden color and are used in decorations. Shakudō is a Japanese decorative alloy of copper containing a low percentage of gold, typically 4–10%, that can be patinated to a dark blue or black color. Copper forms
3036-599: The ATSF due to the bridge over the Kaweah River being washed out. The ATSF was seen by the SP as a rival, so for most of the life of the Visalia Electric only interchanged with its parent SP. The Central Pacific line coming south from Fresno reached Goshen in the summer of 1872. In response, The Visalia Railroad Company was incorporated May 19, 1874 and a seven-mile spur from Goshen was completed August 14, 1874. In 1899
3128-686: The British Geological Survey , in 2005, Chile was the top producer of copper with at least one-third of the world share followed by the United States, Indonesia and Peru. Copper can also be recovered through the in-situ leach process. Several sites in the state of Arizona are considered prime candidates for this method. The amount of copper in use is increasing and the quantity available is barely sufficient to allow all countries to reach developed world levels of usage. An alternative source of copper for collection currently being researched are polymetallic nodules , which are located at
3220-768: The Constitution of the United States . The Southern Pacific Railroad was replaced by the Southern Pacific Company and assumed the railroad operations of the Southern Pacific Railroad. In 1929, Southern Pacific/Texas and New Orleans operated 13,848 route-miles not including Cotton Belt, whose purchase of the Golden State Route circa 1980 nearly doubled its size to 3,085 miles (4,965 km), bringing total SP/SSW mileage to around 13,508 miles (21,739 km). The T&NO
3312-607: The Great Lakes may have also been mining copper during this time, making it one of the oldest known examples of copper extraction in the world. There is evidence from prehistoric lead pollution from lakes in Michigan that people in the region began mining copper c. 6000 BC . Evidence suggests that utilitarian copper objects fell increasingly out of use in the Old Copper Complex of North America during
3404-553: The International Resource Panel 's Metal Stocks in Society report , the global per capita stock of copper in use in society is 35–55 kg. Much of this is in more-developed countries (140–300 kg per capita) rather than less-developed countries (30–40 kg per capita). The process of recycling copper is roughly the same as is used to extract copper but requires fewer steps. High-purity scrap copper
3496-726: The Neolithic period and the Bronze Age was formerly termed the Chalcolithic period (copper-stone), when copper tools were used with stone tools. The term has gradually fallen out of favor because in some parts of the world, the Chalcolithic and Neolithic are coterminous at both ends. Brass, an alloy of copper and zinc, is of much more recent origin. It was known to the Greeks, but became a significant supplement to bronze during
3588-535: The St. Louis Southwestern Railway (Cotton Belt, reporting marks SSW), El Paso and Southwestern Railroad , the Northwestern Pacific Railroad at 328 miles (528 km), the 1,331-mile (2,142 km) Southern Pacific Railroad of Mexico , and a variety of 3 ft ( 914 mm ) narrow-gauge routes. The SP was known for its mammoth back shops at Sacramento, California , which was one of
3680-525: The Vinča culture date to 4500 BC. Sumerian and Egyptian artifacts of copper and bronze alloys date to 3000 BC. Egyptian Blue , or cuprorivaite (calcium copper silicate) is a synthetic pigment that contains copper and started being used in ancient Egypt around 3250 BC. The manufacturing process of Egyptian blue was known to the Romans, but by the fourth century AD the pigment fell out of use and
3772-413: The 1970s, it also founded a telecommunications network with a state-of-the-art microwave and fiber optic backbone. This telecommunications network became part of Sprint , a company whose name came from the acronym for Southern Pacific Railroad Internal Networking Telephony. The original Southern Pacific Railroad was founded in San Francisco in 1865, by a group of businessmen led by Timothy Phelps with
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3864-548: The 9th or 10th century AD. Carbon dating has established mining at Alderley Edge in Cheshire , UK, at 2280 to 1890 BC. Ötzi the Iceman , a male dated from 3300 to 3200 BC, was found with an axe with a copper head 99.7% pure; high levels of arsenic in his hair suggest an involvement in copper smelting. Experience with copper has assisted the development of other metals; in particular, copper smelting likely led to
3956-517: The Bronze Age and a shift towards an increased production of ornamental copper objects occurred. Natural bronze, a type of copper made from ores rich in silicon, arsenic, and (rarely) tin, came into general use in the Balkans around 5500 BC. Alloying copper with tin to make bronze was first practiced about 4000 years after the discovery of copper smelting, and about 2000 years after "natural bronze" had come into general use. Bronze artifacts from
4048-490: The City of Fresno from December 1, 1934 to 1938. It ran through a residential neighborhood and was shut down as a consequence of noise complaints. Passenger revenues peaked in 1912 as the availability of automobiles running on well-paved roads provided a more convenient alternative to the interurban railroad. Passenger service was discontinued on August 31, 1924. The electric overhead from Visalia to Exeter (10.1 miles)
4140-533: The Denver and Rio Grande Western Railroad to the Southern Pacific Transportation Company, allowing the combined Rio Grande Industries railroad system to use the Southern Pacific name due to its brand recognition in the railroad industry and with customers of both the Southern Pacific Transportation Company and the Denver and Rio Grande Western Railroad. A long time Southern Pacific subsidiary, the St. Louis Southwestern Railway
4232-541: The Middle East; a copper pendant was found in northern Iraq that dates to 8700 BC. Evidence suggests that gold and meteoric iron (but not smelted iron) were the only metals used by humans before copper. The history of copper metallurgy is thought to follow this sequence: first, cold working of native copper, then annealing , smelting , and, finally, lost-wax casting . In southeastern Anatolia , all four of these techniques appear more or less simultaneously at
4324-456: The SP logo on the front is replaced by a Union Pacific shield, and new numbers are applied over the old numbers with a Union Pacific sticker, however some engines remain in Southern Pacific "bloody nose" paint. Over the past couple years, most of the patched units were repainted into the full Union Pacific scheme and as of January 2019, less than ten units remain in their old paint. Among the more notable equipment is: On August 19, 2006, UP unveiled
4416-577: The SP shops there, new shops and yards were built six miles south of the city at Bayshore. The Alhambra Shops in Los Angeles consisted of 10 buildings and employed 1,500 but declined in importance when the Taylor Yard was built in 1930. The SP was the defendant in the landmark 1886 United States Supreme Court case Santa Clara County v. Southern Pacific Railroad , which is often interpreted as having established certain corporate rights under
4508-487: The Sierra Nevada Mountains about fifteen miles northeast of Visalia. In June 1899 power began to flow from Hammond, a little over three miles upstream from Three Rivers. Potentially producing 1,800 horsepower (1,300 kW), the power company actually sold 700 horsepower (520 kW). As early as September 10, 1891 Ben Maddox proposed an electric interurban railroad for Tulare County to make use of
4600-563: The Southern Pacific Transportation Company to be taken over by the Union Pacific Corporation ; the parent Southern Pacific Rail Corporation (formerly Rio Grande Industries), the Denver and Rio Grande Western Railroad, the St. Louis Southwestern Railway and the SPCSL Corporation were also taken over by the Union Pacific Corporation. The Union Pacific Corporation merged the Denver and Rio Grande Western Railroad,
4692-588: The Southern Pacific system was a major railroad system incorporating many smaller companies, such as the Texas and New Orleans Railroad and Morgan's Louisiana and Texas Railroad . It extended from New Orleans through Texas to El Paso , across New Mexico and through Tucson , to Los Angeles , through most of California , including San Francisco and Sacramento . Central Pacific lines extended east across Nevada to Ogden, Utah , and reached north through Oregon to Portland . Other subsidiaries eventually included
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#17328020655374784-490: The St. Louis Southwestern Railway and the SPCSL Corporation into their Union Pacific Railroad but did not merge the Southern Pacific Transportation Company into the Union Pacific Railroad. Instead, the Union Pacific Corporation merged the Union Pacific Railroad into the Southern Pacific Transportation Company on February 1, 1998; the Southern Pacific Transportation Company became the surviving railroad and at
4876-465: The Sunset Limited. Well known were the Southern Pacific's unique " cab-forward " steam locomotives. These were 4-8-8-2 , 2-8-8-2 , and 4-6-6-2 (rebuilt from 2-6-6-2 ) locomotives set up to run in reverse, with the tender attached to the smokebox end of the locomotive. Southern Pacific had a number of snow sheds in mountain terrain, and locomotive crews nearly asphyxiated from smoke in
4968-521: The affected areas is highly acidic, with a pH range of 2.1–4.9, and shows elevated electrical conductivity levels between 280 and 1561 mS/cm. These changes in water chemistry make the environment inhospitable for fish, essentially rendering the water uninhabitable for aquatic life. Numerous copper alloys have been formulated, many with important uses. Brass is an alloy of copper and zinc . Bronze usually refers to copper- tin alloys, but can refer to any alloy of copper such as aluminium bronze . Copper
5060-556: The aim of building a rail connection between San Francisco and San Diego, California . The company was purchased in September 1868 by a group of businessmen known as the Big Four : Charles Crocker , Leland Stanford , Mark Hopkins, Jr. and C. P. Huntington . The Big Four had, in 1861, created the Central Pacific Railroad (CPRR) It later acquired the Central Pacific Railroad in 1885 through leasing. By 1900,
5152-541: The atmosphere; 150 mg/kg in soil; 30 mg/kg in vegetation; 2 μg/L in freshwater and 0.5 μg/L in seawater. Most copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Sites include Chuquicamata , in Chile, Bingham Canyon Mine , in Utah, United States, and El Chino Mine , in New Mexico, United States. According to
5244-766: The beginning of the Neolithic c. 7500 BC . Copper smelting was independently invented in different places. The earliest evidence of lost-wax casting copper comes from an amulet found in Mehrgarh , Pakistan, and is dated to 4000 BC. Investment casting was invented in 4500–4000 BC in Southeast Asia Smelting was probably discovered in China before 2800 BC, in Central America around 600 AD, and in West Africa about
5336-556: The cab. After a number of engineers began running their engines in reverse (pushing the tender), Southern Pacific asked Baldwin Locomotive Works to produce cab-forward designs. No other North American railroad ordered cab-forward locomotives. Narrow Gauge Locomotives Until May 1, 1971 (when Amtrak took over long-distance passenger operations in the United States), the Southern Pacific at various times operated
5428-531: The company, especially when sourced from fossil fuels, and from engines required for copper extraction and refinement. Companies that mine land often mismanage waste, rendering the area sterile for life. Additionally, nearby rivers and forests are also negatively impacted. The Philippines is an example of a region where land is overexploited by mining companies. Copper mining waste in Valea Şesei, Romania, has significantly altered nearby water properties. The water in
5520-522: The deprotonated amide ligands. Complexes of copper(III) are also found as intermediates in reactions of organocopper compounds, for example in the Kharasch–Sosnovsky reaction . A timeline of copper illustrates how this metal has advanced human civilization for the past 11,000 years. Copper occurs naturally as native metallic copper and was known to some of the oldest civilizations on record. The history of copper use dates to 9000 BC in
5612-461: The depths of the Pacific Ocean approximately 3000–6500 meters below sea level. These nodules contain other valuable metals such as cobalt and nickel . Copper has been in use for at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900. As with many natural resources, the total amount of copper on Earth is vast, with around 10 tons in
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#17328020655375704-563: The discovery of iron smelting . Production in the Old Copper Complex in Michigan and Wisconsin is dated between 6500 and 3000 BC. A copper spearpoint found in Wisconsin has been dated to 6500 BC. Copper usage by the indigenous peoples of the Old Copper Complex from the Great Lakes region of North America has been radiometrically dated to as far back as 7500 BC. Indigenous peoples of North America around
5796-443: The extra generating capacity. Around 1900 John Hays Hammond and Albert G. Wishon propose an electric railroad from Visalia to Three Rivers (about 30 miles). The Visalia Electric Railroad Company was incorporated April 22, 1904. Ground was broken February 14, 1905 on construction of 11 miles (18 km) of track from Exeter to Lemon Cove. Operations began on July 1, 1906 using steam locomotives. On February 22, 1908,
5888-545: The fastest water exchange rate (speed of water ligands attaching and detaching) for any transition metal aquo complex . Adding aqueous sodium hydroxide causes the precipitation of light blue solid copper(II) hydroxide . A simplified equation is: Aqueous ammonia results in the same precipitate. Upon adding excess ammonia, the precipitate dissolves, forming tetraamminecopper(II) : Many other oxyanions form complexes; these include copper(II) acetate , copper(II) nitrate , and copper(II) carbonate . Copper(II) sulfate forms
5980-483: The few in the country equipped to design and build locomotives on a large scale. Sacramento was among the top ten largest shops in the US, occupying 200 acres of land with dozens of buildings and an average employment of 3,000, peaking at 7,000 during World War II. Other major shop sites were located at Ogden, Utah ; Houston, Texas ; and Algiers, New Orleans . After the 1906 earthquake destroyed much of San Francisco, including
6072-541: The final few years of service. The railroad thrived by transporting produce grown in one of the richest agricultural areas of the nation. Oranges were produced in the greatest quantity; but the line also carried plums, peaches, lemons, grapes, dairy products, and other produce. Visalia Electric originated as many as 44 carloads daily during the harvest peak. At its maximum extent the Visalia Electric Railroad consisted of two main lines. The electrified line went from Visalia east through Exeter, thence north and west to Redbanks,
6164-429: The following named passenger trains . Trains with names in italicized bold text still operate under Amtrak: The man or men who committed this horrible deed near Glendale may not be anarchists, technically speaking. But if they are sane men, moved by motive, they are such stuff as anarchists are made of. If the typical anarchist conceived that a railroad corporation should be terrorized, he would not scruple to wreck
6256-511: The later spelling first used around 1530. Copper, silver , and gold are in group 11 of the periodic table; these three metals have one s-orbital electron on top of a filled d- electron shell and are characterized by high ductility , and electrical and thermal conductivity. The filled d-shells in these elements contribute little to interatomic interactions, which are dominated by the s-electrons through metallic bonds . Unlike metals with incomplete d-shells, metallic bonds in copper are lacking
6348-419: The level of <1% Cu. Concentration of the ore is required, which begins with comminution followed by froth flotation . The remaining concentrate is the smelted, which can be described with two simplified equations: Cuprous oxide reacts with cuprous sulfide to convert to blister copper upon heating This roasting gives matte copper, roughly 50% Cu by weight, which is purified by electrolysis. Depending on
6440-577: The locomotive's smokebox silver (almost white in appearance), with graphite colored sides, for visibility. Some passenger steam locomotives bore the Daylight scheme, named after the trains they hauled, most of which had the word Daylight in the train name. The most famous "Daylight" locomotives were the GS-4 steam locomotives . The most famous Daylight-hauled trains were the Coast Daylight and
6532-472: The modern world. The price of copper is volatile . After a peak in 2022 the price unexpectedly fell. The global market for copper is one of the most commodified and financialized of the commodity markets , and has been so for decades. The great majority of copper ores are sulfides. Common ores are the sulfides chalcopyrite (CuFeS 2 ), bornite (Cu 5 FeS 4 ) and, to a lesser extent, covellite (CuS) and chalcocite (Cu 2 S). These ores occur at
6624-516: The numerous copper sulfides , important examples include copper(I) sulfide ( Cu 2 S ) and copper monosulfide ( CuS ). Cuprous halides with fluorine , chlorine , bromine , and iodine are known, as are cupric halides with fluorine , chlorine , and bromine . Attempts to prepare copper(II) iodide yield only copper(I) iodide and iodine. Copper forms coordination complexes with ligands . In aqueous solution, copper(II) exists as [Cu(H 2 O) 6 ] . This complex exhibits
6716-428: The ore, sometimes other metals are obtained during the electrolysis including platinum and gold. Aside from sulfides, another family of ores are oxides. Approximately 15% of the world's copper supply derives from these oxides. The beneficiation process for oxides involves extraction with sulfuric acid solutions followed by electrolysis. In parallel with the above method for "concentrated" sulfide and oxide ores, copper
6808-539: The overhead wire, two passenger only motor cars similarly equipped, two unpowered passenger cars for powered cars to tow, and a 47-ton Baldwin-Westinghouse box cab freight locomotive. Motor powered equipment carried on-board transformers and rectifiers to convert the 3300-volt AC to the DC required by the traction motors. The line originated at the Visalia train station on the southeast corner of Garden and Oak Streets. In 1916
6900-529: The pruning of branch lines. On October 13, 1988, the Southern Pacific Transportation Company (including its subsidiary, St. Louis Southwestern Railway) was taken over by Rio Grande Industries , the parent company that controlled the Denver and Rio Grande Western Railroad (reporting marks D&RGW). Rio Grande Industries did not merge the Southern Pacific Transportation Company and the Denver and Rio Grande Western Railroad together, but transferred direct ownership of
6992-402: The same time the Union Pacific Corporation renamed the Southern Pacific Transportation Company to Union Pacific Railroad. Thus, the Southern Pacific Transportation Company became, and is still operating as, the current incarnation of the Union Pacific Railroad. Like most railroads, the SP painted most of its steam locomotives black during the 20th century, but after 1945 SP painted the front of
7084-750: The secret to its manufacturing process became lost. The Romans said the blue pigment was made from copper, silica, lime and natron and was known to them as caeruleum . The Bronze Age began in Southeastern Europe around 3700–3300 BC, in Northwestern Europe about 2500 BC. It ended with the beginning of the Iron Age, 2000–1000 BC in the Near East, and 600 BC in Northern Europe. The transition between
7176-438: The service schedules required for perishable produce. Southern Pacific reduced service to Exeter from six to three days per week in 1984; and retirement of their aging refrigerator car fleet left them unable to meet shipping demand for the 1984–1985 navel orange harvest. Piece by piece abandonment of the railroad began in 1942 with the abandonment of the line from Strathmore to El Mirador. The segment from El Mirador to Fayette
7268-505: The spur was leased to the Southern Pacific Railroad. By November 29, 1898 the rails had been extended southeastward from Visalia to Southern Pacific's East Side Line at Exeter, a distance of ten miles. In July 1881 Editor-Publisher Ben M. Maddox (see Ben Maddox Way ) of the Visalia Daily Times began promoting hydroelectric power from John Hays Hammond 's Mount Whitney Power Company on the Kaweah River, which emerges from
7360-438: The sugar is signaled by a color change from blue Cu(II) to reddish copper(I) oxide. Schweizer's reagent and related complexes with ethylenediamine and other amines dissolve cellulose . Amino acids such as cystine form very stable chelate complexes with copper(II) including in the form of metal-organic biohybrids (MOBs). Many wet-chemical tests for copper ions exist, one involving potassium ferricyanide , which gives
7452-471: The system was first electrified from Visalia to Lime Kiln (Terminus Beach). The existing Southern Pacific tracks from Visalia to Exeter were electrified and used as the first leg of the system for passenger service, but freight loads were interchanged with Southern Pacific steam powered freight trains at Exeter. Electric operations began on March 5, 1908 utilizing two combination passenger with baggage section motor cars with pantographs for current pickup from
7544-480: The third and fourth internal combustion, electric transmission locomotives manufactured in the United States. The line extended 16.4 miles (26.4 km) south, paralleling the Atchison, Topeka, and Santa Fe line, to Strathmore. An isolated segment east of Porterville was built in 1916; it went from Tule Jct (1 mile east of Porterville) to Magnolia with a spur to Sunland. A proposed extension past Porterville to Ducor
7636-399: The top kilometer of Earth's crust, which is about 5 million years' worth at the current rate of extraction. However, only a tiny fraction of these reserves is economically viable with present-day prices and technologies. Estimates of copper reserves available for mining vary from 25 to 60 years, depending on core assumptions such as the growth rate. Recycling is a major source of copper in
7728-489: Was abandoned in the summer of 1953. Final abandonment of the Strathmore branch occurred in 1973 with the rails removed by June. Visalia Electric's fixed labor costs discouraged continuation of the low frequency traffic remaining after the produce shippers sought better service. The railroad's employees were non-union with a guaranteed annual wage. The last run on the railroad occurred on September 6, 1990 and abandonment
7820-715: Was also marketed under the Southern Pacific name. Along with the addition of the SPCSL Corporation route from Chicago to St. Louis, the former mainline of the Chicago, Missouri and Western Railroad that once belonged to the Alton Railroad , the total length of the D&;RGW/SP/SSW system was 15,959 miles (25,684 km). Rio Grande Industries was later renamed Southern Pacific Rail Corporation . By 1996, years of financial problems had dropped Southern Pacific's mileage to 13,715 miles (22,072 km). The financial problems caused
7912-399: Was closed in 1992. The Visalia Electric used the unusual choice of 15 Hz AC at 3,300 Volts carried by overhead wire , with pantographs on the cars for pickup. Parent SP intended this as a test bed for main line, long distance electrification of its own lines in the area, a project that never came to fruition. For a short time in 1950–1951 the Visalia Electric briefly interchanged with
8004-527: Was found in 1857 on the Keweenaw Peninsula in Michigan, US. Native copper is a polycrystal , with the largest single crystal ever described measuring 4.4 × 3.2 × 3.2 cm . Copper is the 26th most abundant element in Earth's crust , representing 50 ppm compared with 75 ppm for zinc , and 14 ppm for lead . Typical background concentrations of copper do not exceed 1 ng/m in
8096-428: Was fully merged into the SP in 1961. In 1969, the Southern Pacific Transportation Company was established and took over the Southern Pacific Company; this Southern Pacific railroad is the last incarnation and was at times called "Southern Pacific Industries", though "Southern Pacific Industries" is not the official name of the company. By the 1980s, route mileage had dropped to 10,423 miles (16,774 km), mainly due to
8188-609: Was never built. On 1919 Aug 01 this line was conveyed to the Atchison, Topeka, and Santa Fe Railroad. Locomotives on the electrified part of the railroad used single-phase, 15-hertz electric current at 3,300 volts drawn from an overhead catenary and converted to DC on board for use by the traction motors. Three-phase, 60-hertz electric current at 35,000 volts was bought from the Mount Whitney Power Company and converted at Exeter. A single bracket-type catenary using 7 ⁄ 16 -inch (11 mm) steel messenger
8280-483: Was removed in 1925. Beginning in the 1940s, freight shipments began a steady decline, from 2,355 carloads (1948) to 1,400 carloads (1955), to 1,260 carloads (1960), to 695 (1978), to 195 (1986), to 50 (1989). While productivity of produce in Tulare County was increasing, the decline in freight shipments was initiated by increasing competition from trucks, and accelerated as Southern Pacific lost interest in meeting
8372-576: Was requested August 7, 1992. Southern Pacific Railroad The Southern Pacific ( reporting mark SP ) (or Espee from the railroad initials) was an American Class I railroad network that existed from 1865 to 1996 and operated largely in the Western United States . The system was operated by various companies under the names Southern Pacific Railroad , Southern Pacific Company and Southern Pacific Transportation Company . The original Southern Pacific began in 1865 as
8464-479: Was suspended 22 feet (6.7 m) above the rail on poles 120 feet (37 m) apart, supporting 3/0 trolley wire. The locomotives used sliding shoe-type pantograph trolley exerting an upward force of ten pounds on the wire. March 10, 1908 marked the official start of electric operation. Steam locomotives had been used previously. On November 11, 1944 all electric propulsion ended: flashovers and deterioration of equipment made gas-electric and diesel-electric
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