ACETONE n.
of carbon, six of hydrogen, and one of oxygen; pyroacetic spirit, -- obtained by the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime.
AXIS n.
tersect each other. -- Axis of a balance, that line about which it turns. -- Axis of oscillation, of a pendulum, a right line passing through the center about which it vibrates, and perpendicular to the plane of vibration. -- Axis of polarization, the central line around which the prismatic rings or curves are arran…
BAROMETER n.
oid. -- Marine barometer, a barometer with tube contracted at bottom to prevent rapid oscillations of the mercury, and suspended in gimbals from an arm or support on shipboard. -- Mountain barometer, a portable mercurial barometer with tripod support, and long scale, for measuring heights. -- Siphon barometer, a bar…
BENZENE n.
, very inflammable liquid, C6H6, contained in the naphtha produced by the destructive distillation of coal, from which it is separated by fractional distillation. The name is sometimes applied also to the impure commercial product or benzole, and also, but rarely, to a similar mixed product of petroleum. Benzene nucleu…