Conveniently cropped version of File:Edward Larsson 1885 I.jpg showing the "pentadic" or "pentimal" numeral system included in that document (by Edward Larsson, 1885). See the image description page of that image for more source information.
This image was originally uploaded to en.wikipedia by User:AnonMoos on 23:44, 26 September 2006.
Author
Edward Larsson
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