The illustration represents an improved track-laying device, which has been patented by Edward Ingleton. of the Ingleton Steam Plow Company, of Pottstown, Pa., for use on tractiou engines.

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.

It explains steam engines, which are reciprocating external combustion engines, and compares them to internal combustion engines, such as gasoline and diesel engines. The four-stroke cycle of an ...