Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 100
g the parachute to rock fromside to side. Balloons were at first inflated by placing a fire under anopening at the bottom and allowing the heat to rarify theair within. These fire balloons are no longer used becauseexcessively dangerous. 90 MECHANICS OF GASES. Section II.—Barometers. 311.… … 312. Torricellis Experiment. Fig. 117.If a glass tube more than 760 millimetreslong, with one end closed, be filled with mer-cury and inverted in a vessel of mercury,the mercury will fall, leaving a vacuum inthe upper part, but will remain in the tubeto the height of about 760 millimetres. Thespace…
Physics
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