A textbook on mechanical and electrical engineering (1898)
International Correspondence Schools · Scranton : International Textbook Co., [1898-99] · leaf 449
om Rgoes on, the mercury risesin the tube c d until, whenthe exhaustion is complete,it forms a continuous col-umn 30 inches high; inother words, it is a barom-eter, whose TorricellianFig- 194. vacuum is thereceiver R. This instrument necessarily requires a great deal of time forits operation, but… … PNEUMATICS. 425 1067. Note.—A theoretically perfect vacuum is sometimescalled a Torricellian vacuum. 1068. Magdeburg Hemispheres.—By means ofthe two hemispheres shown in Fig. 195, it can be proventhat the atmosphere presses upon a body equally in all direc-tions. They were invented by Otto Von…
Electrical engineering · Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
