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Napier's Bones

Michael Caulfield, Wayne Anderson

Michael Caulfield and Wayne Anderson Gannon University John Napier (1550-1617) created a procedure for multiplication using sticks or bones. This technique is now referred to as "Napier's Bones" or "Napier's Rods." In this Flash application, you can watch a step-by-step demonstration of the procedure and you may then enter any two factors up to six digits each and watch an animation of the method.


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Michael Caulfield, Wayne Anderson, "Napier's Bones," Convergence (April 2007)