Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 97
303. The Upward Pressure is shown by a variety offamiliar experiments. If a small glass tube be filled withwater and the upper end closed with the finger, the upwardpressure of the air will keep the water in the tube. Butthe most convincing way in which it is shown is by the BUOYANCY OF THE AIR. 87 … Fie:. 112 weight lifter, Fig. 112. This con-sists of a strong glass cylinderwith a piston fitting air tight,which carries a heavy weight, thewhole being supported by a stand.A ground metal plate is placed ontop, and connected to the air pumpby a rubber tube. Exhaustingthe air above the piston, the…
Physics
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