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File:Dempster Mass Spectrometer.gif

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Summary

Description Arthur Dempster's 1918 mass spectrometer
Date
Source http://link.aps.org/abstract/PR/v11/p316
Author Arthur Jeffrey Dempster
Permission
(Reusing this file)		 Public Domain

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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.

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April 1918Gregorian

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Date/TimeThumbnailDimensionsUserComment
current23:20, 24 November 2007Thumbnail for version as of 23:20, 24 November 2007637 × 800 (25 KB)Kkmurray{{Information |Description=Arthur Dempster's 1918 mass spectrometer |Source= http://link.aps.org/abstract/PR/v11/p316 |Date=April, 1918 |Author=Arthur Jeffrey Dempster |Permission=Public Domain |other_versions= }}

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