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Telescopic prismatic compass, 1813-1840.

This telescopic prismatic compass was made by Charles Schmalcalder. Magnetic compasses are portable and easy to use for rapid survey where high accuracy is not required. Charles Schmalcalder took out a patent for a prismatic compass design in 1813. This example includes a telescope and spirit bubble.

Image No. 10282308 | This is a Rights Managed image.

Inventory No.: 1911-0180
Source No.: 1911-0180

Credit © Science Museum / Science & Society Picture Library -- All rights reserved.
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