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See also:BALANCE (derived through the Fr. from the See also:Late See also:Lat. bilantia, an apparatus for weighing, from bi, two, and lanx, a dish or See also:scale) , a See also:term originally used for the See also:ordinary See also:beam See also:balance or weighing See also:machine with two See also:scale pans, but extended to include (with or without adjectival qualification) other apparatus for measuring and comparing weights and forces . In addition to beam and See also:spring balances (see WEIGHING See also:MACHINES), apparatus termed " torsion balances," in which forces are measured or compared by their twisting moment on a See also:wire, are used, especially in gravitational, electrostatic and magnetic experiments (see See also:GRAVITATION and See also:ELECTROMETER) . The term also connotes the See also:idea of equality or equalization; e.g. in the following expressions: " balance," in bookkeeping, the amount which equalizes the debit and See also:credit accounts; " balance See also:wheel," in horology, a See also:device for equalizing the relaxing of a See also:watch or See also:clock spring (see CLOCK) ; the " balancing of engines," the See also:art of minimizing the See also:total vibrations of engines when See also:running, and consisting generally in the introduction• of masses which 'induce vibrations opposed to the vibrations. of the essential parts of the See also:engine . |
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