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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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The quotient is read from left to right, following the lines from one rod to the next.

Genaille–Lucas rulers – Wikipedia

By using this site, you agree to the Terms of Use and Privacy Policy. On each strip is printed a column of triangles and a column of numbers:. The following 2 pages uses this file: After these, a special “remainder” rod is placed on the right.

Five rulers, one for each digit ofare arranged side-by-side, next genaille-oucas the “index” ruler:. The product, shown in red, is This page was last edited on 17 Novemberat Retrieved from ” https: Soon after their development by Genaille, the rulers were adapted to a set of rods that can perform division.


From Wikipedia, the free encyclopedia. Then we simply read off the digits that we visited. From Wikimedia Commons, the free media repository.

By representing the carry graphically, the user can read off the results of simple multiplication problems directly, with no intermediate mental calculations. Description Genaille-Lucas rulers full.

Genaille–Lucas rulers

This page was last edited on 7 Decemberat The popularity of Genaille’s rods was widespread but short-lived, as mechanical calculators soon began to displace manual arithmetic methods. By using this site, you agree to the Terms of Use and Privacy Policy. I grant anyone the right to use this work for any purposewithout any conditions, unless such conditions are required by law.

Genaille, already known for having rulfrs a number of arithmetic tools, created his rulers in the course of solving the problem. The path of digits ends with a number on the remainder rod, which is the remainder given by the division.

The following other wikis use this file: Consider multiplying by 4. Fixed error in 7th column, from File: Summary [ edit ] Description Genaille-Lucas rulers full. Public domain Public domain false false. Views View Edit History. A full set of Genaille—Lucas rulers consists of eleven strips of wood or metal. This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it.


Genaille—Lucas rulers also known as Genaille’s rods are an arithmetic tool invented by Henri Genaillea French railway engineer, in Views Read Edit View history.

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 digits of the dividend. 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.

The device is a variant of Napier’s bones. I, the copyright holder of this work, release this work into the public domain. Retrieved from ” https: The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. In some countries this may not be legally possible; if so: