BAROMETER n.
ter. See Aneroid barometer, under Aneroid. -- 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 measurin…
BEER n.
A fermented extract of the roots and other parts of various plants, as spruce, ginger, sassafras, etc. Small beer, weak beer; (fig.) insignificant matters. "To suckle fools, and chronicle small beer." Shak.
BELLOWS n.
An instrument, utensil, or machine, which, by alternate expansion and contraction, or by rise and fall of the top, draws in air through a valve and expels it through a tube for various purposes, as blowing fires, ventilating mines, or filling the pipes of an organ with wind. Bellows camera, in photography, a form of ca…