File:PSM V40 D411 Electric helicopter and aeroplane.jpg

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Description Electric helicopter and aeroplane
Date between 1891 and 1892
date QS:P,+1891-00-00T00:00:00Z/8,P1319,+1891-00-00T00:00:00Z/9,P1326,+1892-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 40
Author Unknown authorUnknown author
Permission
(Reusing this file)
Public domain

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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Extracted image from book, to greyscale, cropped whitespace. The original can be viewed here: Popular Science Monthly Volume 40.djvu: . Modifications made by Ineuw.

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Date/TimeThumbnailDimensionsUserComment
current09:29, 17 September 2015Thumbnail for version as of 09:29, 17 September 2015776 × 786 (42 KB)Sebastian WallrothCropped 4 % horizontally and < 1 % vertically using CropTool with precise mode.
09:28, 17 September 2015Thumbnail for version as of 09:28, 17 September 2015808 × 787 (45 KB)Sebastian WallrothReverted to version as of 06:18, 7 December 2010
09:28, 17 September 2015Thumbnail for version as of 09:28, 17 September 20151 × 786 (205 bytes)Sebastian WallrothRemoved border by cropping 100 % horizontally and < 1 % vertically using CropTool with precise mode.
06:18, 7 December 2010Thumbnail for version as of 06:18, 7 December 2010808 × 787 (45 KB)Ineuw{{Information |Description = Electric helicopter and aeroplane |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_40.djvu/411 |Date = 1891-1892 |Author = Unknown |Permission = {{PD-old}} |oth
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