Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 133
t equal to theweight of the fluid dis-placed. In the case ofair, if the bodies areheavy, the buoyancy is soslight that it is common-ly neglected; but in veryaccurate weighing theweight of an equal vol-ume of air must alwaysbe added to the apparentweight of a body, since its real weight is reduced… … Fig PRESSURE IN GASES 115 of an air pump and the air exhausted, the sphere showsitself to be heavier than its counterpoise. 127. Balloons.—The principle of aerial buoyancy alsomakes it possible for us to construct air ships and balloonsthat will float and even remain at varying heights at ourwill.…
Physics
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