Twenty glass hydrometers in black case, German, 1933-1945
Set of 20 glass hydrometers in black case (25"x14 1/2"x2") for measuring the specific gravity of sulphuric acid and mineral oils. Said to be associated with the German tar industry (c.1933-45) 13 are etched with a swastika and eagle. (see attached schedule)
- Industrial Chemistry
- Object Number:
- Croda Hydrocarbons Ltd.
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