William J. Young & Sons Transit

Wm. J. Young & Sons (fl. 1870-1881) used a simple transit instrument of this sort as their logo, placing it on their advertisements and on the front cover of their Manual and Price List of Engineering and Mathematical Instruments. The serial number indicates that this example dates from 1872. The horizontal circle is silvered, graduated into 30 minutes of arc, and read by opposite verniers. One vernier reads to single minutes, and the other reads to 1/100 of a degree. The signature reads "Wm. J. Young & Sons 4648 Philadelphia."
Currently not on view
Object Name
date made
William J. Young and Sons
overall: 11 in; 27.94 cm
horizontal circle: 6 1/2 in; 16.51 cm
needle: 5 in; 12.7 cm
telescope: 11 1/4 in; 28.575 cm
aperture: 1 7/8 in; 4.7625 cm
place made
United States: Pennsylvania, Philadelphia
ID Number
accession number
catalog number
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Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center

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