Set of Genaille's rods for division. French, c. 18

Made:
1885 in Paris

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Set of Genaille's rods for division. French, c. 1885

These rods, a variation on Napier’s bones, were invented by Henri Genaille, a civil engineer, in 1885. They avoid even the need for addition of the components in a given area when performing multiplication, as the arrows guide the eyes to the next digit. Both Napier’s bones and Genaille’s rods have recently become popular as teaching aids.

Details

Category:
Mathematics
Object Number:
1994-1450
type:
genaille's rods
credit:
Tesseract