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Set of eleven strips based on Napier's bones

Set of eleven strips based on Napier's bones

1673

Set of flat, boxwood, Napier's rods

Set of flat, boxwood, Napier's rods

1600-1699

'La Multi' calculator, c 1920.

'La Multi' calculator, c 1920.

1918-1922

Set of plastic demonstrative Napier's Bones on mahogany base

Set of plastic demonstrative Napier's Bones on mahogany base

1920-1930

Model of Napier's bones made in perspex for use with overhead projector

Model of Napier's bones made in perspex for use with overhead projector

1972

"Napier's Rods" in case with descriptive leaflet, arranged by J. Blater; published by Trubner & Co. 1888

"Napier's Rods" in case with descriptive leaflet

1888

Set of eleven strips based on Napier's bones, card with copperplate engraving: " Rabdologie par privilege du Roy" made by Sebastien de Pontault, Sieur de Beaulieu, and dated 3 August 1673.

Strips based on Napier's bones, with copperplate engraving

1673