Stalagmometer G .Gerhardt Bonn ca 1890

Stalagmometer G .Gerhardt Bonn ca 1890

€ 165.-

Stalagmometer G .Gerhardt Bonn ca 1890


Box 32 cm wide




C Gerhardt

Country of manufacture


Categories: Scientific, Technology, Physics & Chemistry, Other Technology Antiques


Stalagmometer G Gerhardt Bon ca 1890 in its original box ,
from the former property of the University of Amsterdam ( see box )
engraved in the glass tube: No 7 C Gerhardt Bonn a RH
the glass bulb is engraved with ; J Traube stalagmometer zur Fusselbestimung 20 vol % =101.2 T 15 C
A similar specimen is in the National Museum of American Histoty
A stalagmometer is a glass instrument that measures the surface tension of a liquid, and that was often used to determine alcoholic concentration. Isidor Traube (1860-1943), a chemistry teacher at the Technische-Hochschule in Berlin, devised the form in the 1880s. The “Verf. V. C. Gerhardt” inscription on this example refers to Carl Heinrich Gerhardt (1846-1907), proprietor of a chemical supply house in Bonn. The inscription on the case reads “C. Gerhardt Bonn.”

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NL Early Science

Early Science antiques was founded in 1978 by Fred de Vree based in the Netherlands where I can also be visited by appointment. I have been active for 4 decades as an antiqair and auctioneer, the last 20 years of which are specialized in scientific antiques. I visit collectors and fairs in many European countries. looking for special items please feel free to contact me by Phone or email ,if you need any information on my listed items or something you are looking for 0031653132842 [email protected]

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