Science of Home And Community, a Text-Book in General Science
Science of Home And Community, a Text-Book in General Science
Gilbert H Gilbert Haven Trafton
The book Science of Home And Community, a Text-Book in General Science was written by author Gilbert H Gilbert Haven Trafton Here you can read free online of Science of Home And Community, a Text-Book in General Science book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Science of Home And Community, a Text-Book in General Science a good or bad book?
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It may be possible also to visit a stationary steam engine in some power house in town. Brakes, Modem trains are supplied with powerftd brakes, which make it possible to stop the train quickly. One erf the most common types is the Westinghouse brake, which is worked by compressed air. On the engine is a tank kept filled with compressed air under high pressure. Under each car is a smaller tank connected by a pipe with the main tank 254 SCIENCE OF HOME AND COMMUNITY in the engine. On each car con...nected with the tank is a cylinder provided with a piston'which connects with a brake. The engineer is able to control the working of all the brakes, and by turning a cock the compressed air is caused to enter each cylinder, pushing out the piston which sets the brakes. Railway signals. In order to lessen the possibility of accidents various systems of signals are used so that the engineer may know whether any other trains are near his. The railroad tracks are divided into blocks, or sections, of a few miles in length.
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