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This, in turn, controls the flow rate of the gas and the size of the flame at the burner, and thus the amount of light it produces. This type of lamp generally has a reflector behind the flame to help project the light forward. An acetylene gas powered lamp produces a bright, broad light.
This enabled the light to pass through and reduced the risk of explosion by stopping the "firedamp" methane gas coming in contact with the flame. [1] 1840 Mathieu Mueseler Exhibited The Museler Lamp in Belgium. [2] 1859 William Clark patented the first electrical mining lamp. [3] 1870s J.B.Marsaut (France) double gauze design [4]
In the United States, Consol Energy's Shoemaker Mine, covering a large area east of Benwood, West Virginia was the last underground coal mine to use rail haulage. Starting in 2006, 12 miles of underground conveyor belt and 2.5 miles of above ground conveyor belt were installed. The last load of coal was hauled by rail in January 2010. [73]
The miner's cap (German: Fahrhaube) is part of the traditional miner's costume. It consists of a white material (linen) and served in the Middle Ages to protect the miner when descending below ground ( unter Tage ).
The following is a list of all light rail systems in North America, ranked by ridership. Daily figures for American and Canadian light rail systems are "average weekday unlinked passenger trips" (where transfers between lines are counted as two separate passenger "boardings" or "trips"), unless otherwise indicated.
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Light Green Worked for Fife Coal company and later N.C.B. Fife area. Open air display alongside mainline railway. Springbok: 4112 North British Locomotive Co. 4-8-2+2-8-4 Garratt: 1956 27770 Black 3 ft 6 in (1,067 mm) gauge South African Railways GMA Class. Repatriated c.1988 by Springburn Museum Trust. Open air display outside exhibition hall.
Pre-2009 map of the TriMet MAX Light Rail system in the Portland metropolitan area. Unlike the official map, this one is geographically correct (At normal size, 1 pixel=100 feet). Made using official TriMet data that's been made publicly available for Google Transit and others.