Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 121
air exerts, it is also the source of 112 PHYSICAL SCIENCE. power in a great variety of mechanical operations. Forexample, it is now used almost exclusively for applyingthe breaks in railway carriages, and it is being extensivelyemployed to operate small portable tools such ashammers, drills, etc.… … Fig. 80. Fig. 80 shows a drill and a hammer operated bycompressed air being used in the construction of a boiler. PROPERTIES AND LAWS OP GASES. 113 4- Buoyancy of GasesExperiment 9- Hang a hollow metal or glass globe A from one end of ashort balance beam and attach a weight B to the other endof the…
Physics
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