Young Transit

This transit marked "Wm. J. Young Maker" and "3192" and "Philadelphia" was made in the early 1850s, soon after William J. Young began putting serial numbers on his instruments. The horizontal circle is larger than the compass box, silvered, and graduated every 30 minutes of arc. The two opposite verniers are on a beveled edge; one reads to single minutes, and the other reads to 1/100 of a degree. The tangent screw that moves the plates is at the south side of the horizontal plate. Level vials are at north and west.
Currently not on view
Object Name
Young, William J.
overall: 11 1/4 in; 28.575 cm
baseplate: 7 in; 17.78 cm
needle: 5 in; 12.7 cm
telescope: 10 1/2 in; 26.67 cm
place made
United States: Pennsylvania, Philadelphia
ID Number
catalog number
accession number
Measuring & Mapping
Surveying and Geodesy
See more items in
Medicine and Science: Physical Sciences
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center
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