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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Napier’s Bones and the Genaille-Lucas Rulers

Five rulers, one for each digit ofare arranged side-by-side, next to the “index” ruler:. Views View Edit History.

By using this site, you agree yenaille-lucas the Terms of Use and Privacy Policy. This page was last edited on 7 Decemberat I, the copyright holder of this work, release this work into the public domain. Views Read Edit View history.

I grant anyone the right to use this work for any purposewithout any conditions, unless genaille-licas conditions are required by law. After these, a special “remainder” rod is placed on the right. The following 2 pages uses this file: 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.


Applet: Genaille-Lucas Rulers for Division

The popularity of Genaille’s rods was widespread but short-lived, as mechanical calculators soon began to displace manual arithmetic methods. Then we simply read off the digits that we visited. The following other wikis use this file: Fixed error in 7th column, from File: A full set of Genaille—Lucas rulers consists of eleven strips of wood or metal. Retrieved from ” https: By representing the carry graphically, the user can read off the results of simple multiplication problems directly, with no intermediate mental calculations.

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The division rods are aligned similarly to the multiplication rods, with rulsrs index rod on the left denoting the divisorand the following rods spelling out the digits of the dividend. The quotient genaiole-lucas read from left to right, following the lines from one rod to the next. In some countries this may not be legally possible; if so: Consider multiplying by 4. Summary [ edit ] Description Genaille-Lucas rulers full.

The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. Soon after their development by Genaille, the rulers were adapted to a set of rods that can perform division.

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Napier’s Bones and the Genaille-Lucas Rulers

From Wikipedia, the free encyclopedia. The path of digits ends with a number on the remainder rod, which is the remainder given by the division. Retrieved from ” https: From Wikimedia Commons, the free media repository. This file contains additional information such as Exif metadata which may genailoe-lucas been added by the digital camera, scanner, or software program used to create or digitize it. The device is a variant of Napier’s bones.

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Genaille, already known for having invented a number of arithmetic tools, created his rulers in the course of solving the problem. This page was last edited on genaille-luas Novemberat Genaille—Lucas rulers also known as Genaille’s rods are an arithmetic tool invented by Henri Genaillea French railway engineer, in The product, shown in red, is Description Genaille-Lucas rulers full.