File:Dynamo - iron filings show distorted field.png
Size of this preview: 800 × 575 pixels. Other resolutions: 320 × 230 pixels | 640 × 460 pixels | 861 × 619 pixels.
Original file (861 × 619 pixels, file size: 362 KB, MIME type: image/png)
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Summary
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English: Photographed, reduced to grayscale, and saved as a PNG by Dale Mahalko, Gilman, WI. |
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Public Domain source:
Source and copyright information:
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| Author | Nehemiah Hawkins |
  | This image was uploaded in the PNG image format. However, it contains visible lossy compression artifacts. These artifacts may have come from the JPEG format, from saving a single colorful image as GIF instead of PNG or from saving an animated GIF using the incorrect settings (See also Dither). If possible, please provide a superior version of this file, derived from a non-lossy source (or with artifacts removed). If applicable, please replace all instances of the artifact version throughout Wikimedia projects, tag the old version with one of these templates, and remove this tag. For more information, see Commons:Preparing images for upload and Commons:Media for cleanup.
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Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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Original upload log
The original description page was here. All following user names refer to en.wikipedia.
- 2007-09-15 00:29 DMahalko 861×619× (578602 bytes) This is from the 1917 Hawkins Electrical Guide, page 265 of volume 1. Photographed, reduced to grayscale, and saved as a PNG by me. Dale Mahalko, Gilman, WI Source and copyright information: {| | [[Image:1917 Hawkins Electrical Guide - Titlepage.jpg|3
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:55, 7 April 2021 | | 861 × 619 (362 KB) | JohnVanVliet | jpg artifact removal |
| 16:51, 15 November 2008 |  | 861 × 619 (565 KB) | File Upload Bot (Magnus Manske) | {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|TBD '''Public Domain''' source: * Hawkins Electrical Guide, Volume 1 * Chapter 19: Theory of the Armature, Page 265 * Copyright 1917 by Theo. Audel & Co. * Printed in the United States |
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