File:PSM V42 D522 Idiosyncratic arithmetic.jpg

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Description Idiosyncratic arithmetic
Date between 1892 and 1893
date QS:P,+1892-00-00T00:00:00Z/8,P1319,+1892-00-00T00:00:00Z/9,P1326,+1893-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 42
Author Unknown authorUnknown author
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Extracted image from book, to grayscale, cropped whitespace. Modifications made by Ineuw. The original can be found here: Popular Science Monthly Volume 42.

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current19:28, 19 January 2011Thumbnail for version as of 19:28, 19 January 2011601 × 914 (13 KB)Ineuw{{Information |Description = Idiosyncratic arithmetic |Source = [http://www.archive.org/details/popularsciencemo421893newy Popular Science Monthly Volume 42] |Date = 1892-1893 |Author = Unknown |Permission = {{PD-old}

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