Portable Horizontal Sundial by C. Stedman

Portable Horizontal Sundial by C. Stedman

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Description
This brass horizontal sundial consists of a round, portable dial with lid. The dial is on a ring fastened near the top of the case. It is calibrated from IIII to XII to VIII by I's, divided to 1/8 hour. The triangular brass gnomon is fastened to two brass pieces transversing the dial. The gnomon is scalloped on two edges. It folds up for use and measures 2 X 3 cm. Paper compass roses are inside the lid and at the bottom of the case. Both roses are divided by degrees into four quadrants of 90 degrees each. The compass inside the lid has eight points lettered. The compass in the case has thirty-two points lettered. A fleur de lis is at North. A brass point extends upward at the center of this compass and may originally have held the needle. The dial aligns approximately along the N/S axis of the compass.
A mark on the compass rose inside the lid reads: C. STEDMAN (/) LONDON.
Christopher Stedman began to make instruments in London in 1747. He employed at least 15 men before he died c. 1774. His widow, Elizabeth Stedman, carried on the business until 1784, and passed it on to their son, also named Christopher Stedman.
Compare 330838.
Location
Currently not on view
Object Name
sundial, horizontal portable
date made
1750
maker
Stedman, Christopher
place made
United Kingdom: England, London
Measurements
overall: 2 cm x 6.8 cm x 6.8 cm; 25/32 in x 2 11/16 in x 2 11/16 in
ID Number
1986.0599.01
catalog number
1986.0599.01
accession number
1986.0599
Credit Line
Gift of Mrs. Ruth M. Parks
subject
Mathematics
Timekeeping
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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