- Short discussions of the sextant began appearing in physics texts in the 1880s, and inexpensive sextants suitable for pedagogical purposes followed soon thereafter. This die-cast metal instrument is of that sort. Welch catalogs describe it as a "convenient demonstration model of an engineer’s or a mariner’s sextant." The scale is graduated every 30' from 0° to 120° and read by vernier to six minutes of arc. A small bubble level is mounted on the sighting tube. The inscription reads "W. M. WELCH SCIENTIFIC COMPANY (/) WELCH (/) ESTABLISHED 1880 (/) 1515 SEDGWICK ST. CHICAGO. U.S.A."
- Ref: W. M. Welch Scientific Company, Catalog. Scientific Apparatus (Chicago, 1929-1963).
- W. M. Welch Scientific Company, "Instructions for the Use of No. 3536 Sextant Model."
- Currently not on view
- Object Name
- date made
- ca 1929-1963
- Welch Scientific Company
- place made
- United States: Illinois, Chicago
- overall: 2 1/4 in x 7 7/8 in x 7 1/4 in; 5.715 cm x 20.0025 cm x 18.415 cm
- overall: 2 1/4 in x 8 in x 7 1/4 in; 5.715 cm x 20.32 cm x 18.415 cm
- ID Number
- catalog number
- accession number
- Data Source
- National Museum of American History
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