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File:PSM V51 D780 Chart of voluntary attention in education.png

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Description Chart of voluntary attention in education
Date
Source Popular Science Monthly Volume 51
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 51.

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Date/TimeThumbnailDimensionsUserComment
current02:08, 6 May 2011Thumbnail for version as of 02:08, 6 May 20112,061 × 1,565 (209 KB)Ineuw{{Information |Description = Chart of voluntary attention in education |Source = [ttp://www.archive.org/details/appletonspopular51youmrich Popular Science Monthly Volume 51] |Date = 1897 |Author = Unknown |Permission
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