- In 1884, after a Committee of the German State Railways noticed a connection between the viscosity of mineral oils and their lubricating properties, Carl Oswald Viktor Engler designed a viscometer for use with oils of this type. An improved model followed in 1892. Engler’s viscosimeter was widely used in Germany and elsewhere on the Continent, and was available in the U.S. by the early years of the twentieth century. The “1745 / PTR / 1906” inscription on this example refers to the Physikalisch-Technische Bundesanstalt, the national metrology institute of Germany.
- Ref: C. Engler, “Viscosimeter,” Chemiker Zeitung 9 (1885).
- Henry Heil, Illustrated Catalogue and Price-List of Chemical Apparatus (New York, 1903), pp. 441-442.
- Currently not on view
- Object Name
- Viscosimeter, Doolittle Torsion
- overall: 15 in x 6 in; 38.1 cm x 15.24 cm
- overall: 15 in x 7 1/2 in x 6 1/4 in; 38.1 cm x 19.05 cm x 15.875 cm
- ID Number
- catalog number
- accession number
- Credit Line
- Gift of University of Pennsylvania Chemistry Lab
- See more items in
- Medicine and Science: Chemistry
- Data Source
- National Museum of American History
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