On the Water

Wood and Ivory Parallel Rule

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.

ID Number:
1978.0052.08
Material:
ivory, wood, brass
Dimensions:
3.1875 x 4.5 x 0.75
Source:
Gift of Dr. and Mrs. Wilbur J. Gould

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