File:PSM V79 D262 Unit components of a positive and negative charge.png

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English: Unit components of a positive and negative charge
Date
Source Popular Science Monthly Volume 79
Author Unknown authorUnknown author

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:PSM_V79_D262_Unit_components_of_a_positive_and_negative_charge.png

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12 September 1911Gregorian

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Date/TimeThumbnailDimensionsUserComment
current08:24, 18 December 2017Thumbnail for version as of 08:24, 18 December 2017858 × 424 (23 KB)IneuwUser created page with UploadWizard