Chemical Calculator

Chemical Calculator

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Usage conditions apply
Mason L. Farrow (1905-1984), a young chemist in Colorado, obtained a copyright on the Chemical Calculator in 1933. The Chemical Rubber Company in Cleveland, Ohio, produced and distributed the form. This example was sent to the "Cincinnati Burchers (sic) Supply Corp." in December 1935.
Currently not on view
Object Name
calculator, chemical
Chemical Calculator
date made
after 1933
Chemical Rubber Publishing Company
place made
United States: Ohio, Cleveland
Physical Description
paper (overall material)
calculator: 7 1/4 in; 18.415 cm
envelope: 7 3/4 in x 7 3/4 in; 19.685 cm x 19.685 cm
overall: caculator: 7 1/4 in; 18.415 cm
overall: envelope: 7 3/4 in x 7 3/4 in; 19.685 cm x 19.685 cm
ID Number
catalog number
accession number
See more items in
Medicine and Science: Chemistry
Data Source
National Museum of American History
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