File:Dynamo - iron filings show distorted field.png

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Original file ‎(861 × 619 pixels, file size: 362 KB, MIME type: image/png)

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Summary

Description
English: Photographed, reduced to grayscale, and saved as a PNG by Dale Mahalko, Gilman, WI.
Date
Source

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

Source and copyright information:

Transferred from en.wikipedia to Commons by Oxyman using CommonsHelper.
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

Public domain
Public domain
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.
United States
United States
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.

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

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Date/TimeThumbnailDimensionsUserComment
current23:55, 7 April 2021Thumbnail for version as of 23:55, 7 April 2021861 × 619 (362 KB)wikimediacommons>JohnVanVlietjpg artifact removal

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