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Gunner's Compendium
Unsigned
Dated 1595; German
Gilt brass; 172 mm in length

This is an unusual form of instrument which combines a caliper, direct-reading gunner's gauge scales and gunner's sight with a horizontal string gnomon sundial, a compass, a calendar-zodiacal scale and a quadrant.

Gunnery and time-telling are occasionally found together on other instruments (see, for example, Epact 98184). However, this instrument also has a number of errors, not only in the division and numbering of its scales but even in its ability to fulfil its apparent purpose. Yet it is not a unique aberration; at least one other device of the same general form is known.

Museum of the History of Science, Oxford
Inventory number 52589

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Basic URL: http://www.mhs.ox.ac.uk/epact/catalogue.php?ENumber=46123

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