Image: John machin
John_machin.jpg (261 × 326 pixels, file size: 13 KB, MIME type: image/jpeg)
Description: John Machin, a professor of astronomy at Gresham College, London
Title: John machin
Credit: http://www-history.mcs.st-andrews.ac.uk/PictDisplay/Machin.html
Author: Unknown authorUnknown author
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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