Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 253
t is under the action of force of gravity, and cannot expandfarther than when its density is in equilibrium with the said force. Conceivethe atmosphere to consist of a great number of layers, one on the top of theother; the density of the under layers will evidently be greatest, because theupper… … a! A is a vessel full of mercury, in which is placed verti-cally a glass tube about 3 feet high above the surface I;in the glass tube is fitted, air-tight, piston a, just onesquare inch area, which can be moved by the piston-rodc ; now the piston stand is at a on the level I, and in con-tact with…
Mechanical engineering · Engineering
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