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

By representing the gnaille-lucas graphically, the user can read off the results of simple multiplication problems directly, with no intermediate mental calculations. Retrieved from ” https: Description Genaille-Lucas rulers full. Five rulers, one for each digit ofare arranged side-by-side, next to the “index” ruler:.

## Genaille–Lucas rulers

I, the copyright holder of this work, release this work into the public domain. The device is a variant of Napier’s bones. The timestamp is only as accurate as the clock in genaille-pucas 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. I grant anyone the right to use this work for any purposewithout any conditions, unless such conditions are required by law. After these, a special “remainder” rod is placed on the right. 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.

### Genaille–Lucas rulers – Wikipedia

Genaille, already known for having invented a number of arithmetic tools, created his rulers in the course of solving the problem. The product, shown in red, is The following other wikis use this file: By using this site, you agree to the Terms of Use and Privacy Genailke-lucas. From Wikimedia Commons, the free media repository.

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

From Wikipedia, the free encyclopedia. This page was last edited on 7 Decemberat 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. By using this site, you agree to the Terms of Use and Privacy Policy. Summary [ edit ] Description Genaille-Lucas rulers full. This page was last edited on 17 Novemberat Fixed error in 7th column, from File: The following 2 pages uses this file: Retrieved from ” https: Consider multiplying by 4.

### Applet: Genaille-Lucas Rulers for Division

In some countries this may not be legally possible; if so: The popularity of Genaille’s rods was widespread but short-lived, as mechanical calculators soon began to displace manual arithmetic methods.

A full set of Genaille—Lucas rulers consists of eleven strips of wood or metal.

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. Public domain Public domain false false.

## File:Genaille-Lucas rulers full.pdf

Then we simply read off the digits that we visited. On each strip is printed a column of triangles and a column of numbers:.

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.