Specific gravity glass hydrometer by Eydam & Krieger Jimenau 1. Thur
- Object Number:
- 1991-275 Pt1
- type:
- hydrometer
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)