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| | Diesel Locomotives |
 | | Again, when a steam locomotive is employed on intermittent work, such as shunting, it is necessary to keep up the supply of steam, by stoking the boiler, all the time that the engine is idle, in order to be able to start at short notice; this means a wastage of coal. |
 | | Despite its numerous advantages, the Diesel locomotive is inferior to the steam type in one important respect - namely, that it requires a transmission system to convey the power from the engine to the driving wheels, and to deliver this power at the proper wheel speed. |
 | | In the steam locomotive the fuel is burnt much more wastefully in the firebox of a boiler to convert water into steam, the latter being admitted into the cylinder of a steam engine working at lower pressures and temperatures. |
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