Entries 1 to 8. Total of 8 entries found.
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 Description 
Alcoholometers Richter & Tralles / Gering & Co. 
Density hydrometers / Gering & Co. 
Density hydrometers / Gering & Co. 
Density hydrometers / Gering & Co. 
Hydrometer Bischoff / Gering & Co. 
Hydrometer for calcium hydroxide / Gering & Co. 
Hydrometers Baumé / Gering & Co. 
Universal hydrometers without thermometer / Gering & Co.