# Baumé ( *Baumé hydrometer* )

A hydrometer for measuring the density of liquid
and gum solutions, named after its inventor,
Antoine Baumé. The Baumé scale is
either of two arbitrary hydrometer scales, one for
liquids heavier than water and the other for
liquids lighter than water, that indicate specific
gravity in degrees. The calculation (in the United
States) for liquids heavier than water is:
60° 145
Specific gravity at --- F = ---
60° 145
-° Baumé

and for liquids lighter than water:
60° 140
Specific gravity at --- F = ---
60° 130
+° Baumé

Slightly different conversions are used in other
countries or in specific industries. (179 , 362 )