Bostrom Convertible Level

Ernst Alfred Bostrom (1855-1923) was a Swedish immigrant who worked as a machinist for the telephone company in Atlanta, Georgia. After enrolling with the International Correspondence School, he advanced to foreman and then to superintendent. He formed the Bostrom-Brady Manufacturing Co. in 1901 and began manufacturing a simple and inexpensive farm level of his own design. The Bostrom Convertible Level followed some years later, and could be used as either a transit or a level. Alfred Droke used this example while working with the Civilian Conservation Corps during the 1930s. The instrument is marked MFD. BY BOSTROM-BRADY MFG. CO. ATLANTA, GA.. The box is marked BOSTROM SURVEYING INSTRUMENTS MODEL NO. 5 SERIAL NO. 47 BOSTROM-BRADY MFG. CO. ATLANTA, GA. U.S.A.
Currently not on view
date made
ca 1935
Bostrom-Brady Mfg. Co.
place made
United States: Georgia, Atlanta
Physical Description
brass (overall material)
overall: 16 cm; 6 5/16 in
telescope: 26 cm; 10 1/4 in
graduated circle: 4 in; 10.16 cm
box: 30 cm x 15 cm x 18 cm; 11 13/16 in x 5 29/32 in x 7 3/32 in
overall in case: 7 5/8 in x 12 in x 6 1/16 in; 19.3675 cm x 30.48 cm x 15.39875 cm
ID Number
accession number
catalog number
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Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History, Kenneth E. Behring Center


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