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Genaille-Lucas Division Applet

Multiplication Applet




Genaille–Lucas rulers (also known as Genaille's rods) is an arithmetic tool invented by Henri Genaille, a French railway engineer, in 1891. The device is a variant of Napier's bones.

Genaille Lucas division
                  applet

The user can read off the results of simple division problems directly, with no intermediate mental calculations.

Example: 874 : 7

Start reading the result by the
first number in the column of dividend's first digit, and in the row of the divisor (7),
and follow the lines:

             division by genaille-Lucas rods applet Java
             Genaille-Lucas division applet example

874 : 7 = 124 R 6






Links


Genaille–Lucas rulers (Wikipedia)

Early Calculation (Ed Thelen)

Napier's Bones, Genaille-Lucas Rulers (Georgi Dalakov)

Napier's Bones and the Genaille-Lucas Rulers (Brian Borchers)

Qui est Henri Genaille?

Digitale Rechengeräte

Rods for Multiplication and Division


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Updated: 2013 May 13