This analytical balance is marked “A. RŰPRECHT WIEN” at the base of the column. A trade label in the case reads, in part: “ALB. RŰPRECHT. . .Mechanische Atelier für Präcisionwagen und Gewichte” with evidence of awards ranging from a diploma in 1873 to a gold medal from the Vienna exhibition of 1890.
The Smithsonian bought this balance for Edward W. Morley, a chemist at Adelbert College of Western Reserve University in Cleveland, Ohio. Morley used it to measure the atomic weight of oxygen, and returned it to the Smithsonian after completing this work.
Ref: Edward W. Morley, “On the Densities of Oxygen and Hydrogen and on the Ratio of their Atomic Weights,” Smithsonian Institution Contribution to Knowledge 29 (1895).
Currently not on view
Object Name
Object Type
Date made
date made
used by
Morley, Edward Williams
Rüprecht, Albert
Physical Description
wood (case material)
glass (case material)
brass (balance material)
beam: 16 1/8 in; 40.9575 cm
case: 29 in x 30 in x 15 in; 73.66 cm x 76.2 cm x 38.1 cm
Place Made
Österreich: Wien, Vienna
ID Number
catalog number
accession number
Science & Mathematics
Artifact Walls exhibit
See more items in
Medicine and Science: Chemistry
Artifact Walls exhibit
Data Source
National Museum of American History, Kenneth E. Behring Center

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