Glass Gerber hydrometer (with internal thermometer) by unknown maker

Made:
1900-1960

Glass Gerber hydrometer (with internal thermometer) by unknown maker. 159mm long. Range 25 - 35. Mercury weight and paper scale. In dark grey cardboard tube; end of top missing, 1900 - 1960. Hydrometer index 276

Details

Category:
Experimental Chemistry
Object Number:
1997-1081
Materials:
glass, mercury, paper (fibre product) and cardboard
type:
hydrometer
credit:
-