File:PSM V41 D658 Metronome counter trace of 20 seconds.jpg

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Description Metronome counter trace of 20 seconds
Date
Source Popular Science Monthly Volume 41
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 41.

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Date/TimeThumbnailDimensionsUserComment
current09:26, 17 September 2015Thumbnail for version as of 09:26, 17 September 20151,558 × 1,137 (54 KB)Sebastian WallrothRemoved border by cropping < 1 % horizontally and < 1 % vertically using CropTool with lossless mode.
08:33, 5 January 2011Thumbnail for version as of 08:33, 5 January 20111,560 × 1,139 (44 KB)Ineuw{{Information |Description = Metronome counter trace of 20 seconds |Source = [http://www.archive.org/details/popularsciencemo41newy Popular Science Monthly Volume 41] |Date = 1892 |Author = Unknown |Permission = {{PD-
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