This is a semi-micro balance in an aluminum frame with glass sides. There is a drawer on one side of the base. On the other is a keyboard mechanism for adjusting the riders which are used instead of weights. The rider apparatus is rhodium plated; most of the other metal parts are gold plated; the knife edges and planes are agate; the beam is an aluminum alloy. The inscription on the beam reads “Wm. Ainsworth & Sons, Inc. / Denver, Colo. / U.S.A.” The inscription on the ivory scale reads “WM Ainsworth & Sons, Inc. / Denver, Colo. Made in U.S.A. / TYPE TCY No. 42794.” Various tags read “Property U.S. Government / NASA / 502616” and “B. Preiser Co., Inc.” and “Solar Physics Brach / Space Sciences Div., Code 614 / Goddard Space Flight Center.”
Ref: William Ainsworth & Sons, Inc. Ainsworth Laboratory Balances and Weights (Denver, 1956), p. 7.
Currently not on view
date made
around 1960
Ainsworth, William
place made
United States: Colorado, Denver
Physical Description
aluminum (overall material)
glass (overall material)
overall: 45.6 cm x 25.4 cm x 48.4 cm; 17 15/16 in x 10 in x 19 1/16 in
ID Number
accession number
catalog number
Credit Line
Goddard Space Flight Center
Weights & Measures
See more items in
Medicine and Science: Chemistry
Data Source
National Museum of American History


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