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Displaying 6 - 10 of 16
Marine Chronometer by Charles Frodsham, No. 1909
Artifact

Chronometers like this one by Charles Frodsham were used on the U.S. Exploring Expedition (1838-1842).

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Marine Chronometer by Molyneaux & Son, No. 1436
Artifact

Chronometers like this one by Molyneaux & Son were used on the U.S. Exploring Expedition (1838-1842).

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Marine Chronometer by Parkinson & Frodsham, No. 2349
Artifact

Chronometers like this one by Parkinson & Frodsham were used on the U.S. Exploring Expedition (1838-1842).

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Mark IB Astrograph
Artifact

This compact projector used film strips to overlay star curves onto special plotting charts to determine lines of position.

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Mask
Artifact

Mask, Oregon Territory

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