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BAUME - (a.) Designating or conforming to either of the scales used by the French chemist Antoine Baume in the graduation of his hydrometers; of or relating to Baume's scales or hydrometers. There are two Baume hydrometers. One, which is used with liquids heavier than water, sinks to 0Ў in pure water, and to 15Ў in a 15 per cent salt solution; the other, for liquids lighter than water, sinks to 0Ў in a 10 per cent salt solution and to 10Ў 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.