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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Consider multiplying by 4. The following 2 pages uses this file: Retrieved from ” https: Views View Edit History.

The quotient is read from left to right, following the lines from one rod to the next. The following other wikis use genai,le-lucas file: By using this site, you agree to the Terms of Use and Privacy Policy.

Genaille—Lucas rulers also known as Genaille’s rods are an arithmetic tool invented by Henri Genaillea French railway engineer, in I, the copyright holder of this work, release this work into the public domain. From Wikipedia, the free encyclopedia.

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 timestamp is only as accurate as the clock in the camera, and it may be completely rulerw.


Applet: Genaille-Lucas Rulers

Genaille, already known for having invented a number of arithmetic tools, created his rulers in the course of solving the problem. This file genallle-lucas 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.

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Views Read Edit View history. By using this site, you agree to the Terms of Use and Privacy Policy. The device is a variant of Napier’s bones. Then we simply read off the digits that we visited.

Napier’s Bones and the Genaille-Lucas Rulers

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

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Fixed error in 7th column, from File: The popularity of Genaille’s rods was widespread but short-lived, as mechanical calculators soon began to displace manual arithmetic methods. On each strip is printed a column of triangles and a column of numbers:.


In some countries this may not be legally possible; if so: Five rulers, one for each digit ofare arranged side-by-side, next to the “index” ruler:. 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 rlers digits of the dividend.

The path of digits ends with a number on the remainder rod, which is the remainder given by genaille-lucas division.

Genaille–Lucas rulers

Summary [ edit ] Description Genaille-Lucas rulers full. Retrieved from ” https: This page was last edited on 7 Decemberat After these, a special “remainder” rod is placed on the ruelrs.

This page was last edited on 17 Novemberat From Wikimedia Commons, the free media repository.

Last modified: February 17, 2020