Image: Recorde - The Whetstone of Witte - equals
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Recorde_-_The_Whetstone_of_Witte_-_equals.jpg (490 × 194 pixels, file size: 75 KB, MIME type: image/jpeg)
Description: Robert Recorde's explanation of the first usage of the mathematical equals sign from which the current "=" symbol origins.
Title: Recorde - The Whetstone of Witte - equals
Credit: http://blog.plover.com/math/recorde.html - The image is an excerpt from the Recorde's book The Whetstone of Witte.
Author: Robert Recorde
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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