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Usage conditions apply
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 became available in the U.S. in 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
Associated Place
United States: New Jersey
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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