A textbook on mechanical and electrical engineering (1898)
International Correspondence Schools · Scranton : International Textbook Co., [1898-99] · leaf 451
. Xow, suppose the piston1 III. I.n;. to bi; moved downwards until it is just on the point of being puilled out of the c-ylinder. The volume:il)ove it will then be twice as great as l)efore, and the pres-sure one-half as great, or l,rdS-f-2 = 2,:)0.) jiounds. Thetotal upward ])ressure will be the… … PNEUMATICS. 427 1070. The Baroscope.—The buoyant effect of air isvery clearly shown by means of an instrument called thebaroscope, shown in Fig. 197.It consists of a scale beam, fromone extremity of which is sus-pended a small weight, and fromthe other a hollow copper sphere.In air they exactly…
Electrical engineering · Mechanical engineering
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