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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Applet: Genaille-Lucas Rulers
Five rulers, one for each digit ofare arranged side-by-side, next to the “index” ruler:. Public domain Public domain false false. Description Genaille-Lucas rulers full.
Napier’s Bones and the Genaille-Lucas Rulers
Consider multiplying by 4. 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.
I, the copyright holder of this work, release this work into the public domain. Retrieved from ” https: Summary [ edit ] Description Genaille-Lucas rulers full.
Fixed error in 7th column, from File: On each strip is printed a column of triangles and a column of numbers:.
The path of digits ends with a number on the remainder rod, which is the remainder given by the division. 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 The device is a variant of Napier’s bones.
Genaille–Lucas rulers – Wikipedia
Views Read Edit View history. 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. 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 wrong. The following 2 pages uses this file: From Wikipedia, the free encyclopedia.
The popularity of Genaille’s rods was widespread but short-lived, as mechanical calculators soon began to displace manual arithmetic methods. Soon after their development by Genaille, the rulers were adapted to a set of rods that can perform division. From Wikimedia Commons, the free media repository. This page was last edited on 17 Novemberat By representing the carry graphically, the user can read off the results of simple multiplication problems directly, with no intermediate mental calculations.