Genaille–Lucas rulers (also known as Genaille’s rods) is an arithmetic tool invented by Henri Genaille, a French railway engineer, in The following other wikis use this file: Usage on مساطر جينايل لوكاس. Usage on Genaille–Lucas rulers. Napier’s Bones and the Genaille-Lucas Rulers. Introduction. In , John Napier published Rabdologia, a book that contained a description of the rods that he.

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After these, a special “remainder” rod is placed on the right. Retrieved from ” https: This file contains additional information such as Exif metadata which may have been added by the rulwrs camera, scanner, or software program used to create or digitize it. From Wikimedia Commons, the free media repository.

Genaille—Lucas rulers also known as Genaille’s rods are an arithmetic tool invented by Henri Genaillea French railway engineer, in The division rods are aligned similarly to the multiplication rods, with the index rod on the left denoting the divisorand the following rods spelling out the ruers of the dividend.

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The device is a variant of Napier’s bones. The following other wikis use this file: Views Read Edit View history.

Consider multiplying by 4. Genaille, already known for having invented a number of arithmetic tools, created his rulers in the course of solving the problem.

File:Genaille-Lucas rulers – Wikimedia Commons

I grant anyone the right to use this work for any purposewithout any conditions, unless such conditions are required by law. By using this site, you agree to the Terms of Use and Privacy Policy. The path of digits ends with a number on the remainder rod, which is the remainder given by the division.

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Genaille–Lucas rulers

Views View Edit History. Then we simply read off the digits that we visited. I, the copyright holder of this work, release this work into the public domain. In some countries this may not be legally possible; if so: Fixed error in 7th column, from File: This page was last edited on 7 Decemberat The popularity egnaille-lucas Genaille’s rods was widespread but short-lived, as mechanical calculators soon began to displace manual arithmetic methods.

File:Genaille-Lucas rulers full.pdf

If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. Summary [ edit ] Description Genaille-Lucas rulers full.


Description Genaille-Lucas rulers full.

By representing the carry graphically, the user can read off the results of simple multiplication problems directly, with no intermediate mental calculations. From Wikipedia, the free encyclopedia. On each strip is printed a column of triangles and gejaille-lucas column of numbers:.

Five rulers, one for each digit ofare arranged side-by-side, next genxille-lucas the “index” ruler:. This page was last edited on 17 Novemberat Retrieved from ” https: Public domain Public domain false false. The quotient is read from left to right, following the lines from one rod to the next.

A full set of Genaille—Lucas rulers consists of eleven strips of wood or metal. Soon after their development by Genaille, the rulers were adapted to a set of rods that can perform division. The following 2 pages uses this file: The product, shown in red, is