Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 215
n the inte-rior surface of the tube increases,it gradually uncoils, and the handpoints to the number of atmos-pheres of pressure. When thepressure is removed, the tube,in virtue of its elasticity, resumesits original position, and the handpoints to the first division of thescale. The barometer… … Fig. 200. THE THREE STATES OP MATTEB. 191 is in the condition of equilibrium. Wlien, however, the pressureof the atmosphere diminishes, there is an excess of pressure on theinterior surface of the tube, and it tends to uncoil; on the otherhand, when the atmospheric pressure increases, there is an…
Matter · Heat
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