Summary
Set of 10 ivory rods for simple calculations such as multiplication. Made in England circa 1750. Mounted on display board with a picture of John Napier, inventor of logarithms, and an enlargement of the rods.
Napier's rods were an early form of calculation device.
Physical Description
Set of 10 ivory rods for simple calculations, in wooden box, mounted on display board with a picture of Napier and an enlargement of the rods.
More Information
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Collecting Areas
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Acquisition Information
Purchase
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Place & Date Made
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
2 cm (Length), 7 cm (Width), 7 cm (Height)
BACKING BOARD 18 BY 34 BY 3
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Dimensions
6.5 cm (Length), 6.5 cm (Width), 1.5 cm (Height)
Measurement From Conservation. Measuring Method: Box only
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Keywords