Genaille's rods

Made:
1885 in Paris and France
inventor:
Édouard Lucas
Genaille's Rods: 11 Reglettes Financieres' for calculating interest by Henri Genaille and Edouard Lucas, 1885, in

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Genaille's Rods: 11 Reglettes Financieres' for calculating interest by Henri Genaille and Edouard Lucas, 1885, in
Science Museum Group
© The Board of Trustees of the Science Museum

Genaille's Rods: 11 "Reglettes Financieres" for calculating interest by Henri Genaille and Edouard Lucas, 1885, in cardboard box

Les Reglettes Financieres'; financial rules for calculating interest, invented by Henri Genaille and Edouard Lucas and published by Eugene Belin & Son, 1885 Genaille's rods are a variation on Napier's bones which make multiplication simly a matter of following line pointers..

Details

Category:
Mathematics
Object Number:
1989-861
type:
arithmetical calculator
credit:
Delehar, P.