Dip Circle

Dip Circle

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Wesleyan University was founded in 1831, and during the next several years it purchased some $6000 worth of scientific apparatus, much of it made in Paris. This dip circle is from that period. It is marked "Lerebours à Paris" and "W.U. No. 2." The vertical circle is suspended from a brass hook attached to a rotating knob, and so can be turned in any direction. The horizontal circle, on top, is graduated to single degrees. The vertical circle is graduated to 30 minutes; the glass covers are missing.

Ref: Lerebours, Notice d'instruments d'optique, de mathematiques, et de physique (Paris, 1830).

Stanley Guralnick, Science and the Ante-Bellum American College (Philadelphia, 1975), pp. 45-46.

Currently not on view
Place Made
France: Île-de-France, Paris
Physical Description
wood (overall material)
metal (overall material)
overall: 12 in; 30.48 cm
overall: 13 3/16 in x 12 1/16 in x 4 1/4 in; 33.49625 cm x 30.63875 cm x 10.795 cm
ID Number
accession number
catalog number
Credit Line
Wesleyan University
Science & Scientific Instruments
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Science & Mathematics
Data Source
National Museum of American History


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