AMERICAN INVENTIONS AND INVENTORS.
SECTION I.—HEAT
CHAPTER I.
FIRE.
A TRAIN LEAVING THE STATION
"All aboard!" cries the conductor, and slowly the long train draws out of the San Francisco station on its way to Chicago and the Atlantic coast. Three sleepers, two chair coaches, passenger, baggage, and mail cars, loaded with travelers, trunks, and pouches of letters and papers; we are familiar with the sight of these heavy cars and the puffing engine which draws them. But what makes the train move? What power is great enough to do this? It is the power of steam, and steam is made from water by means of fire.