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Astrolabe (back), owned by Robert Gordon of Straloch, Aberdeenshire

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made in France

Astrolabe (back), owned by Robert Gordon of Straloch, Aberdeenshire
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This brass astrolabe dates from the early 15th century. It was made in France, probably by Jean Fusoris (c. 1365-1436), and later owned by Robert Gordon (1580-1661) of Straloch in Aberdeenshire.

The photograph shows the back of the instrument, with the alidade unmounted. It shows (from the rim inwards) the degree scale, zodiac calendar, calendar scale; in the upper central part, the unequal hour scale, and in the lower part, the shadow square.

Robert Gordon made a major contribution to Scottish cartography by extensively revising the manuscript surveys of Timothy Pont (c.1565-c.1614) for publication by the Blaeus in Amsterdam.

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