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baume n. 波美(比重计) 波美(比重计) Baum' e \ Bau` m[' e]"\, a. Designating or conforming to either of the scales used by the French chemist Antoine Baum[' e] in the graduation of his hydrometers; of or relating to Baum[' e]' s scales or hydrometers. There are two Baum[' e] hydrometers. One, which is used with liquids heavier than water, sinks to 0[ deg] in pure water, and to 15[ deg] in a 15 per cent salt solution; the other, for liquids lighter than water, sinks to 0[ deg] in a 10 per cent salt solution and to 10[ deg] in pure water. In both cases the graduation, based on the distance between these fundamental points, is continued along the stem as far as desired. Note: Since all the degrees on a Baum[' e] scale are thus equal in length, while those on a specific- gravity scale grow smaller as the density increases, there is no simple relation between degrees Baum[' e] and specific gravity. However, readings on Baum[' e] s scale may be approximately reduced to specific gravities by the following formul[ ae] ( x in each case being the reading on Baum[' e]' s scale): ( a) for liquids heavier than water, sp. gr. = 144 [ div] ( 144 - x); ( b) for liquids lighter than water, sp. gr. = 144 [ div] ( 134 x). [ Webster 1913 Suppl.]
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