Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 636
Weighing the air. ascertained turn the stop-cock, the air will rush in, and theglobe will then pull down the balance, thus proving that airpossesses weight. The experiments of Torricelli and OttoVon Guerike, however, demonstrated that the air has weight THE AIR-PUMP. 73 … Magdeburg Hemispheres. and great pressure. Torricelli practically invented the barometer, but Otto Von Guerike, by the cups known as Magdeburg Hemispheres, proved the pressure of the outward air. This apparatus is well known, and consists of two hollow copper hemispheres which fit very closely. By…
Scientific recreations
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