File:Figure 2 Colorimeter Cat no33-29-40 p4.tif

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Figure 2 - Schematic electrical diagram   (Wikidata search (Cirrus search) Wikidata query (SPARQL)  Create new Wikidata item based on this file)
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Title
Figure 2 - Schematic electrical diagram
Description

Figure 2 - Schematic electrical diagram from Bausch & Lomb Spectronic 20 Colorimeter Cat No. 33-29-40, Reference manual. Rochester, New York: Bausch & Lomb Incorporated, [1962], page 4. Figure caption reads: "FIGURE 2 - SCHEMATIC ELECTRICAL DIAGRAM".

Note: The date of 1962 is based on the last two digits of the code on the back cover, "332940-181ND, 600, II-62".

There is no copyright statement in the manual, and no copyright registration renewal for the manual. It is therefore in the public domain in the United States of America.
Date 1962
date QS:P571,+1962-00-00T00:00:00Z/9
institution QS:P195,Q5090408
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Notes Image downloaded with permission from the Science History Institute, as part of the Wikipedian in Residence initiative.
Source Science History Institute
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Public domain
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

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Date/TimeThumbnailDimensionsUserComment
current14:37, 24 February 2016Thumbnail for version as of 14:37, 24 February 20161,555 × 1,308 (5.84 MB)Mary Mark Ockerbloom (talk | contribs)== {{int:filedesc}} == {{Photograph |photographer ={{unknown}} |title =Figure 2 - Schematic electrical diagram |description =Figure 2 - Schematic electrical diagram from ''Bausch & Lomb Spectronic 20 Colorimeter Cat No. 33...

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