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Wood and Ivory Parallel Rule

Wood and Ivory Parallel Rule

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Part of the navigator’s tool kit, parallel rules were used to transfer compass points, course lines and other directional information across large charts without change. This large wooden set has a carved ivory whale inlaid into its surface, with a brass tack for the whale’s eye.
Object Name
parallel rule
scrimshaw parallel rule
Object Type
Physical Description
wood (overall material)
ivory (overall material)
brass (overall material)
overall: 3 3/16 in x 4 1/2 in x 3/4 in; 8.09625 cm x 11.43 cm x 1.905 cm
ID Number
accession number
catalog number
Credit Line
Gift of Dr. and Mrs. Wilbur J. Gould
Expansion and Reform
See more items in
Work and Industry: Maritime
Cultures & Communities
Industry & Manufacturing
Natural Resources
On the Water exhibit
On the Water
Exhibition Location
National Museum of American History
Data Source
National Museum of American History
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