. The working and management of an English railway . e,having an outside diameter of i^ in., and an insidediameter off in., connecting hydrants are then attachedto the main, to which gas-hose is attached at distancesof about 120 ft. for filling the cylinders in the hose is of india-rubber and canvas knit together, andis capable of withstanding a pressure of 150 lbs. to thesquare inch; it has attaching unions and stopcocks ateach end, so that it can be taken off the main withoutwaste of gas, the main and the carriage cylinders havingstop valves, so that all can be closed before de
. The working and management of an English railway . e,having an outside diameter of i^ in., and an insidediameter off in., connecting hydrants are then attachedto the main, to which gas-hose is attached at distancesof about 120 ft. for filling the cylinders in the hose is of india-rubber and canvas knit together, andis capable of withstanding a pressure of 150 lbs. to thesquare inch; it has attaching unions and stopcocks ateach end, so that it can be taken off the main withoutwaste of gas, the main and the carriage cylinders havingstop valves, so that all can be closed before detaching thehose. The gas in the main can also be drawn off intothe gas-holder when it is desired, for any reason, to emptythe carriage cylinders. Each carriage has one or twocylinders, which are filled to a pressure of 110 lbs. tothe square inch, and are made of lined steel, with theseams welded, and two of these, 16 feet in length, with adiameter of 13 in., will carry a sufficient supply of gasto keep twenty lights burning on a journey from London. ROLLING STOCK—CARRIAGES. 139 to Aberdeen and back. Gas cannot be consumed underthis high pressure, but has to be passed through a regu-lator, so as to reduce it to something Hke the pressureof coal gas as used for household purposes, and this iseffected by a very simple contrivance. The gas passesfrom the high pressure cylinder through a small needlehole, with a pin valve and lever attached to a diaphragm,in a round box. As soon as 95 water gas gauge pres-sure has entered this box, the diaphragm rises and closesthe valve, which does not re-open until the lights areturned on, when it admits gas at the same rate at whichit is consumed at the burners. Each jet can be regu-lated to a given size, so that it cannot blaze and causewaste, and all the lights in a carriage can be turned offor half-off, by a key at the end of the carriage. Finally,each carriage has a pressure gauge to indicate the pres-sure of gas in the cylinders, and to sh
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectlondonandnorthwester
