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64-538: All stations are located in Tokyo. The line was originally constructed by the Ōji Electric Tram Company ( 王子電気軌道 , Ōji-denki-kidō ) as a part of their extensive network, with the oldest section still operating today opened in 1913. The line was at threat of being shut down along with the rest of Tokyo's streetcar system in the 1960s, but concerted opposition from residents prevented this and parts of lines 27 (Minowabashi-Akabane) and 32 (Arakawa-Waseda) were merged to form

128-636: A day. Later trains of about 25 trams hauled by 3 horses became normal. The owners of the line did allow other people to use it on payment of a toll but it is not known if anyone did. Regular locomotive working began in 1832. The wagons (or trams) were about 7 ft 6 in long by 4 ft 9 in wide at the top, made of wood strapped with iron and carried on cast iron wheels 2 ft 6 in to 2 ft 9 in diameter. They weighed about 15 cwt and carried at least two tons. There were 250 of them by 1830. Trevithick's locomotive built at Penydarren in 1804 made several runs after its famous initial run. On one occasion it

192-644: A future connection to other lines, and the choice of track gauge was still a pragmatic decision based on local requirements and prejudices, and probably determined by existing local designs of (road) vehicles. Thus, the Monkland and Kirkintilloch Railway (1826) in the West of Scotland used 4 ft 6 in ( 1,372 mm ); the Dundee and Newtyle Railway (1831) in the north-east of Scotland adopted 4 ft  6 + 1 ⁄ 2  in ( 1,384 mm );

256-518: A huge preponderance of standard gauge . When Bristol promoters planned a line from London, they employed the innovative engineer Isambard Kingdom Brunel . He decided on a wider gauge, to give greater stability, and the Great Western Railway adopted a gauge of 7 ft ( 2,134 mm ), later eased to 7 ft  1 ⁄ 4  in ( 2,140 mm ). This became known as broad gauge . The Great Western Railway (GWR)

320-503: A new independent line was proposed to open up an unconnected area, the gauge was crucial in determining the allegiance that the line would adopt: if it was broad gauge, it must be friendly to the Great Western railway; if narrow (standard) gauge, it must favour the other companies. The battle to persuade or coerce that choice became very intense, and became referred to as "the gauge wars" . As passenger and freight transport between

384-580: A novelty in the shape of a mixed-gauge goods train was introduced between Truro and Penzance. It was worked by a narrow-gauge engine, and behind the narrow-gauge trucks came a broad-gauge match-truck with wide buffers and sliding shackles, followed by the broad-gauge trucks. Such trains continued to run in West Cornwall until the abolition of the Broad Gauge; they had to stop or come down to walking pace at all stations where fixed points existed and

448-421: A plateway, spaced these at 4 ft 4 in ( 1,321 mm ) over the outside of the upstands. The Penydarren Tramroad probably carried the first journey by a locomotive, in 1804, and it was successful for the locomotive, but unsuccessful for the track: the plates were not strong enough to carry its weight. A considerable progressive step was made when cast iron edge rails were first employed; these had

512-517: A relatively static disposition of infantry, requiring considerable logistics to bring them support staff and supplies (food, ammunition, earthworks materials, etc.). Dense light railway networks using temporary narrow gauge track sections were established by both sides for this purpose. Merthyr Tramroad The Merthyr Tramroad (sometimes referred to as the Penydarren Tramroad due to its use by Trevithick's locomotive, built at

576-429: A required standard. A loading gauge is a two-dimensional profile that encompasses a cross-section of the track, a rail vehicle and a maximum-sized load: all rail vehicles and their loads must be contained in the corresponding envelope. A structure gauge specifies the outline into which structures (bridges, platforms, lineside equipment etc.) must not encroach. The most common use of the term "track gauge" refers to

640-657: A slight variation from the nominal gauge for pragmatic reasons. The gauge is defined in imperial units , metric units or SI units. Imperial units were established in the United Kingdom by the Weights and Measures Act 1824 . The United States customary units for length did not agree with the imperial system until 1959, when one international yard was defined as 0.9144 meters and, as derived units, 1 foot (= 1 ⁄ 3  yd) as 0.3048 meter and 1 inch (= 1 ⁄ 36  yd) as 25.4 mm. The list shows

704-663: A successful locomotive on the Killingworth Wagonway , where he worked. His designs were successful, and when the Stockton and Darlington Railway was opened in 1825, it used his locomotives, with the same gauge as the Killingworth line , 4 ft 8 in ( 1,422 mm ). The Stockton and Darlington line was very successful, and when the Liverpool and Manchester Railway , the first intercity line,

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768-484: Is also used for the suburban railway systems in South Australia , and Victoria , Australia . The term "medium gauge" had different meanings throughout history, depending on the local dominant gauge in use. In 1840s, the 1,600 mm ( 5 ft 3 in ) Irish gauge was considered a medium gauge compared to Brunel's 7 ft  1 ⁄ 4  in ( 2,140 mm ) broad gauge and

832-468: Is the distance between the two rails of a railway track . All vehicles on a rail network must have wheelsets that are compatible with the track gauge. Since many different track gauges exist worldwide, gauge differences often present a barrier to wider operation on railway networks. The term derives from the metal bar, or gauge, that is used to ensure the distance between the rails is correct. Railways also deploy two other gauges to ensure compliance with

896-506: Is typically greater for track limited to slower speeds, and tighter for track where higher speeds are expected (as an example, in the US the gauge is allowed to vary between 4 ft 8 in (1,420 mm) to 4 ft 10 in (1,470 mm) for track limited to 10 mph (16 km/h), while 70 mph (110 km/h) track is allowed only 4 ft 8 in (1,420 mm) to 4 ft 9 + 1 ⁄ 2  in (1,460 mm). Given

960-410: Is undertaken when no other alternative is available. The nominal track gauge is the distance between the inner faces of the rails. In current practice, it is specified at a certain distance below the rail head as the inner faces of the rail head (the gauge faces ) are not necessarily vertical. Some amount of tolerance is necessarily allowed from the nominal gauge to allow for wear, etc.; this tolerance

1024-550: Is used between China and Central Asia, and between Poland and Ukraine, using the SUW 2000 and INTERGAUGE variable axle systems. China and Poland use standard gauge, while Central Asia and Ukraine use 1,520 mm ( 4 ft  11 + 27 ⁄ 32  in ). When individual railway companies have chosen different gauges and have needed to share a route where space on the ground is limited, mixed gauge (or dual gauge) track, in which three (sometimes four) rails are supported in

1088-494: The 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) narrow gauge, which became the modern standard gauge . In modern usage, the term "narrow gauge" generally refers to track spaced significantly narrower than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Narrow gauge is the dominant or second dominant gauge in countries of Southern, Central Africa, East Africa, Southeast Asia, Japan, Taiwan, Philippines, Central America and South America, During

1152-599: The Bratislava – Lviv train, and the Romania/Moldova border on the Chișinău – Bucharest train. A system developed by Talgo and Construcciones y Auxiliar de Ferrocarriles (CAF) of Spain uses variable gauge wheelsets ; at the border between France and Spain, through passenger trains are drawn slowly through an apparatus that alters the gauge of the wheels, which slide laterally on the axles. A similar system

1216-601: The Redruth and Chasewater Railway (1825) in Cornwall chose 4 ft ( 1,219 mm ). The Arbroath and Forfar Railway opened in 1838 with a gauge of 5 ft 6 in ( 1,676 mm ), and the Ulster Railway of 1839 used 6 ft 2 in ( 1,880 mm ). Locomotives were being developed in the first decades of the 19th century; they took various forms, but George Stephenson developed

1280-496: The Transmongolian Railway , Russia and Mongolia use 1,520 mm ( 4 ft  11 + 27 ⁄ 32  in ) while China uses the standard gauge of 1,435 mm. At the border, each carriage is lifted and its bogies are changed . The operation can take several hours for a whole train of many carriages. Other examples include crossings into or out of the former Soviet Union: Ukraine/Slovakia border on

1344-489: The 12.2 km (7.6 mi) trip in 50 minutes. The gauge is 1,372 mm ( 4 ft 6 in ). The line is fully double-track, and draws 600 V electrical supply. Two Toden Arakawa trams (one in revenue earning service, the other undergoing brake testing) collided on June 13, 2006 near the Minowabashi terminus, injuring 27 people. The Toden Arakawa Line operates in northern and eastern Tokyo outside

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1408-454: The GWR, there was an extended period between political intervention in 1846 that prevented major expansion of its 7 ft  1 ⁄ 4  in ( 2,140 mm ) broad gauge and the final gauge conversion to standard gauge in 1892. During this period, many locations practicality required mixed gauge operation, and in station areas the track configuration was extremely complex. This

1472-669: The Glamorganshire Canal proprietors but the upper section of the proposed line was built anyway, compulsory powers were provided for by provisions in the Glamorganshire Canal Act but were not invoked. The engineer was George Overton and construction began in 1800, under the supervision of Richard Hill of the Plymouth Ironworks. It was completed in 1802. The Dowlais company already had edge rail lines of narrower gauge from their works to near

1536-579: The Middle East, and China. In modern usage, the term "broad gauge" generally refers to track spaced significantly wider than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Broad gauge is the dominant gauge in countries in Indian subcontinent, the former Soviet Union ( CIS states, Baltic states, Georgia and Ukraine), Mongolia, Finland (which still uses the original Soviet Gauge of 1524mm), Spain, Portugal, Argentina, Chile and Ireland. It

1600-610: The Neath Abbey Ironworks supplied a six-wheeled rack and adhesion locomotive weighing 8 tons named "Perseverance" with inclined cylinders and twin chimneys (allowing them to be lowered alongside the boiler to pass through the tunnel at Plymouth). Another somewhat similar locomotive (but without a geared rack drive) named "Mountaineer" was built in 1833 by the Neath Abbey Co. for the Dowlais Company. As

1664-404: The actual distance between the rails lies within tolerances of a prescribed standard: on curves, for example, the spacing is wider than normal. Deriving from the name of the bar, the distance between these rails is also referred to as the track gauge. The earliest form of railway was a wooden wagonway, along which single wagons were manhandled, almost always in or from a mine or quarry. Initially

1728-402: The allowed tolerance, it is a common practice to widen the gauge slightly in curves, particularly those of shorter radius (which are inherently slower speed curves). Rolling stock on the network must have running gear ( wheelsets ) that are compatible with the gauge, and therefore the gauge is a key parameter in determining interoperability, but there are many others – see below. In some cases in

1792-407: The ancient houses passing close to the window. The tram almost touched the overhanging eaves.... The tram snaked its way through this private back-alley world." L.W. Demery, R. Forty, R. DeGroote and J.W. Higgins, Electric Railways of Japan (Interurbans- Tramways-Metros) Vol.1: Tokyo and Northern Japan . Light Rail Transit Association, 1983. Rail gauge In rail transport , track gauge

1856-540: The charging area of the blast furnaces. The average gradient from Merthyr to Abercynon was 1 in 145. Near Quakers Yard two timber bridges carried the line over the River Taff where it runs through a gorge in a large loop. After the collapse of one of these bridges beneath a train in 1815 they were both replaced by brick arches. Later on chairs were introduced into which the plate rails were keyed. Initially one horse pulled about five trams, making one return journey

1920-561: The convenience in laying it and changing its location over unimproved ground. In restricted spaces such as tunnels, the temporary way might be double track even though the tunnel will ultimately be single track. The Airport Rail Link in Sydney had construction trains of 900 mm ( 2 ft  11 + 7 ⁄ 16  in ) gauge, which were replaced by permanent tracks of 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) gauge. During World War I, trench warfare led to

1984-543: The drawings included a cross section of the Plymouth tunnel and it had a hinged chimney it was presumably intended to be used on the Merthyr Tramroad (unlike a second smaller locomotive built in 1832 which had a fixed chimney). The 0-6-0 "Dowlais" built by Neath Abbey in 1836 had the inclined cylinders mounted at the front (unlike the previous locomotives which had rear mounted cylinders) and rack drive for use on

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2048-448: The earliest days of railways, the railway company saw itself as an infrastructure provider only, and independent hauliers provided wagons suited to the gauge. Colloquially the wagons might be referred to as "four-foot gauge wagons", say, if the track had a gauge of four feet. This nominal value does not equate to the flange spacing, as some freedom is allowed for. An infrastructure manager might specify new or replacement track components at

2112-542: The haulier and four other people riding on it fell into the river killing one horse, badly cutting another and injuring two of the people. In 1823, a Bill was unsuccessfully promoted to extend the line to Cardiff. It was some of the same promoters who obtained the Act for the Taff Vale Railway in 1836. Although the Taff Vale Railway opened to Merthyr in 1841 it was not until 1851 that the standard gauge Dowlais Railway

2176-451: The head of the canal at Merthyr and these were converted to 4 ft 4 in gauge plateways to connect with this new line allowing through running. In 1804, Trevithick's pioneering steam locomotive made a few experimental runs along this line. In 1815, a wooden bridge over the Taff near Quakers Yard collapsed beneath a train carrying iron from Penydarren. The whole train including the horses,

2240-423: The imperial and other units that have been used for track gauge definitions: A temporary way is the temporary track often used for construction, to be replaced by the permanent way (the structure consisting of the rails, fasteners, sleepers/ties and ballast (or slab track), plus the underlying subgrade) when construction nears completion. In many cases narrow-gauge track is used for a temporary way because of

2304-451: The incline to Dowlais. "Charles Jordan" delivered from Neath Abbey in 1838 was an adhesion only locomotive very similar to "Mountaineer". The last record of spare parts being supplied to Dowlais for these locomotives was in 1840-1841. An 1848 inventory of Dowlais plant lists only "Mountaineer" of the above locomotives. No plateway locomotives were listed in 1856. The locomotives had a maximum 3 ton axle load and plate layers were carried on

2368-525: The ironworks) was a 9.75-mile-long (15.69 km) line that opened in 1802, connecting the private lines belonging to the Dowlais and Penydarren Ironworks with the Glamorganshire Canal at Abercynon, also serving the Plymouth Ironworks along the way. It is famous as the line, on which Richard Trevithick 's experimental locomotive hauled the first train to carry a load (of 10 tons of iron). It

2432-555: The line as it is today. The line was sold to the Tokyo Metropolitan Bureau of Transportation in 1974, which renamed it the Toden Arakawa Line. The Toden Arakawa Line operates between the terminals at Minowabashi Station and Waseda Station. It runs along Meiji Street between Asuka-yama Station and Oji Eki-mae Station. Otherwise, it operates on its own tracks. Presently, single driver-operated cars make

2496-401: The main tourist areas. The terminus at Minowabashi is near the historical site of Edo 's red-light district Yoshiwara which features a completely covered shopping street, several blocks long, in the once common "Ameyoko" style (a shōtengai ). In Haruki Murakami 's novel Norwegian Wood , protagonist Toru Watanabe takes the line to near Ōtsuka Station : "I sat in the last seat and watched

2560-402: The major axis of the rail section configured vertically, giving a much stronger section to resist bending forces, and this was further improved when fish-belly rails were introduced. Edge rails required a close match between rail spacing and the configuration of the wheelsets, and the importance of the gauge was reinforced. Railways were still seen as local concerns: there was no appreciation of

2624-404: The narrow portion side-stepped to right or left. In rare situations, three different gauges may converge on to a rail yard and triple-gauge track is needed to meet the operational needs of the break-of-gauge station – most commonly where there is insufficient space to do otherwise. Construction and operation of triple-gauge track and its signalling, however, involves immense cost and disruption, and

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2688-555: The period known as " the Battle of the gauges ", Stephenson's standard gauge was commonly known as "narrow gauge", while Brunel's railway's 7 ft  1 ⁄ 4  in ( 2,140 mm ) gauge was termed " broad gauge ". Many narrow gauge railways were built in mountainous regions such as Wales , the Rocky Mountains of North America, Central Europe and South America. Industrial railways and mine railways across

2752-438: The same time the single flue was replaced by 82 copper fire tubes. It was at this time given the name "Eclipse" and commenced work on the Merthyr Tramroad on 22 June 1832. The chimney must have been hinged to allow it to go through the Plymouth tunnel. The Dowlais Company's line linking their works to the Merthyr Tramroad had a maximum gradient of 1 in 16.5 and considered too steep for locomotives to work by adhesion alone. In 1832

2816-416: The same track structure, can be necessary. The most frequent need for such track was at the approaches to city terminals or at break-of-gauge stations. Tracks of multiple gauges involve considerable costs in construction (including signalling work) and complexities in track maintenance, and may require some speed restrictions. They are therefore built only when absolutely necessary. If the difference between

2880-497: The space between the rails of a track is colloquially referred to as the "four-foot", and the space between two tracks the "six-foot", descriptions relating to the respective dimensions. In modern usage the term "standard gauge" refers to 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Standard gauge is dominant in a majority of countries, including those in North America, most of western Europe, North Africa,

2944-401: The trains to replace broken plates. On 1 April, 1839, more than 4,000 plates were required to make the tramway good though little more than half that number had been supplied by the three ironworks. By 22 June that year 1,600 more plates were broken, of which the Dowlais engines were blamed for smashing 1,450. By July the tramroad was reported to be almost impassable, for two days being blocked by

3008-420: The transverse distance between the inside surfaces of the two load-bearing rails of a railway track , usually measured at 12.7 millimetres (0.50 inches) to 15.9 millimetres (0.63 inches) below the top of the rail head in order to clear worn corners and allow for rail heads having sloping sides. The term derives from the "gauge", a metal bar with a precisely positioned lug at each end that track crews use to ensure

3072-553: The two areas became increasingly important, the difficulty of moving from one gauge to the other—the break of gauge —became more prominent and more objectionable. In 1845 a Royal Commission on Railway Gauges was created to look into the growing problem, and this led to the Regulating the Gauge of Railways Act 1846 , which forbade the construction of broad gauge lines unconnected with the broad gauge network. The broad gauge network

3136-617: The two gauges is large enough – for example between 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) standard gauge and 3 ft 6 in ( 1,067 mm ) – three-rail dual-gauge is possible, but if not – for example between 3 ft 6 in ( 1,067 mm ) and 1,000 mm ( 3 ft  3 + 3 ⁄ 8  in ) metre gauge – four rails must be used. Dual-gauge rail lines occur (or have occurred) in Argentina, Australia, Brazil, Japan, North Korea, Spain, Switzerland, Tunisia and Vietnam. On

3200-513: The wagon wheels. As the guidance of the wagons was improved, short strings of wagons could be connected and pulled by teams of horses, and the track could be extended from the immediate vicinity of the mine or quarry, typically to a navigable waterway. The wagons were built to a consistent pattern and the track would be made to suit the needs of the horses and wagons: the gauge was more critical. The Penydarren Tramroad of 1802 in South Wales,

3264-441: The wagons were guided by human muscle power; subsequently by various mechanical methods. Timber rails wore rapidly: later, flat cast-iron plates were provided to limit the wear. In some localities, the plates were made L-shaped, with the vertical part of the L guiding the wheels; this is generally referred to as a "plateway". Flanged wheels eventually became universal, and the spacing between the rails had to be compatible with that of

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3328-826: The world are often narrow gauge. Sugar cane and banana plantations are mostly served by narrow gauges. Very narrow gauges of under 2 feet (610 mm) were used for some industrial railways in space-restricted environments such as mines or farms. The French company Decauville developed 500 mm ( 19 + 3 ⁄ 4  in ) and 400 mm ( 15 + 3 ⁄ 4  in ) tracks, mainly for mines; Heywood developed 15 in ( 381 mm ) gauge for estate railways . The most common minimum gauges were 15 in ( 381 mm ), 400 mm ( 15 + 3 ⁄ 4  in ), 16 in ( 406 mm ), 18 in ( 457 mm ), 500 mm ( 19 + 3 ⁄ 4  in ) or 20 in ( 508 mm ). Through operation between railway networks with different gauges

3392-486: Was a single-track plateway with a gauge of 4 ft 4 in over the flanges of the L-shaped cast-iron plate rails (or 4 ft 2 in ( 1,270 mm ) between the inside of the flanges). The plates were 3 ft long weighing 56 lb each and were spiked to rough stone blocks about 18 in square. There were frequent passing loops, at Plymouth Ironworks the line ran through a tunnel only 8 ft high beneath

3456-443: Was adopted, but many countries or companies chose a different gauge as their national gauge, either by governmental policy, or as a matter of individual choice. Standard gauge is generally known world-wide as being 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Terms such as broad gauge and narrow gauge do not have any fixed meaning beyond being materially wider or narrower than standard. In British practice,

3520-476: Was completed allowing through running to its works. Penydarren Ironworks closed in 1859. Plymouth Works did not cease iron production until 1880 but had built a standard gauge line over part of the tramroad in 1871. South of Mount Pleasant the disused tramroad was lifted in about 1890. Only a single photograph of the tramroad has survived, taken in 1862 and showing widening of the Quaker's Yard viaduct. The line

3584-441: Was compounded by the common rail having to be at the platform side in stations; therefore, in many cases, standard-gauge trains needed to be switched from one side of the track to the other at the approach. A special fixed point arrangement was devised for the purpose, where the track layout was simple enough. In some cases, mixed gauge trains were operated with wagons of both gauges. For example, MacDermot wrote: In November 1871

3648-519: Was eventually converted—a progressive process completed in 1892, called gauge conversion . The same Act mandated the gauge of 5 ft 3 in ( 1,600 mm ) for use in Ireland. As railways were built in other countries, the gauge selection was pragmatic: the track would have to fit the rolling stock. If locomotives were imported from elsewhere, especially in the early days, the track would be built to fit them. In some cases standard gauge

3712-491: Was largely superseded when the Taff Vale Railway opened in 1841, and sections gradually went out of use over two decades, from about 1851. The four principal ironworks at Merthyr Tydfil were Dowlais (built 1759), Plymouth (built 1763), Cyfarthfa (built 1765) and Penydarren (built 1784). Initially the output of these ironworks was carried by packhorse or on carts 25 miles to Cardiff. In 1794, Cyfarthfa works

3776-470: Was linked to Cardiff by the Glamorganshire Canal, the other three ironworks were linked to it by tramways. Richard Crawshay of Cyfarthfa Ironworks held the controlling interest in the canal company and claimed preferential treatment. The upper heavily locked section of the canal suffered from congestion. A Bill for a tramroad from Merthyr to Cardiff was defeated in Parliament in 1799, by opposition from

3840-533: Was opened in 1830, it used the same gauge. It too was very successful, and the gauge, widened to 4 ft  8 + 1 ⁄ 2  in or 1,435 mm and named " standard gauge ", was well on its way to becoming the established norm. The Liverpool and Manchester was quickly followed by other trunk railways, with the Grand Junction Railway and the London and Birmingham Railway forming

3904-532: Was originally impossible; goods had to be transshipped and passengers had to change trains. This was obviously a major obstacle to convenient transport, and in Great Britain, led to political intervention. On narrow gauge lines, rollbocks or transporter wagons are used: standard gauge wagons are carried on narrow gauge lines on these special vehicles, generally with rails of the wider gauge to enable those vehicles to roll on and off at transfer points. On

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3968-497: Was referred to as "narrow gauge" to indicate the contrast. Some smaller concerns selected other non-standard gauges: the Eastern Counties Railway adopted 5 ft ( 1,524 mm ). Most of them converted to standard gauge at an early date, but the GWR's broad gauge continued to grow. The larger railway companies wished to expand geographically, and large areas were considered to be under their control. When

4032-449: Was successful and was greatly expanded, directly and through friendly associated companies, widening the scope of broad gauge. At the same time, other parts of Britain built railways to standard gauge, and British technology was exported to European countries and parts of North America, also using standard gauge. Britain polarised into two areas: those that used broad gauge and those that used standard gauge. In this context, standard gauge

4096-404: Was successfully tried hauling 25 tons. It weighed about 5 tons and broke many of the cast iron plate rails. In 1829, Stephenson supplied a six-wheeled locomotive with inclined cylinders mounted at the rear for use on the narrower gauge internal lines at Penydarren, it cost £375. In 1832 it was returned to Stephensons for conversion to a four-wheeled locomotive for use on the Merthyr Tramroad and at

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