CONSIDEBABLE progress has recently been made in developing the type of boiler used in electric power stations ... can be effected by the use of larger steam-generating units, higher steam ...

Before the steam engine can be called an economical power, our modern system of boilers must be immensely improved, or an entirely new system of applying the heat to the water must be contrived.

Steam engine makers have been- occupied ... First—The entire machine, including its boiler, occupies no more room than, an ordinary turning lathe. Second—It is as easy pat together as ...

By contrast, the steam engines that preceded the internal combustion engines and electric trains of today ... to the valve ...