File:Optic Projection fig 48A.jpg
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[edit]DescriptionOptic Projection fig 48A.jpg | caption: "Fig. 48 A. Wall Receptacles with Separable Cap. Wall receptacle with the connecting prongs polarized so that the cap can be put in only one way, thus avoiding change of polarity with direct current." |
Date | |
Source |
Optic Projection: Principles, Installation and Use of the Magic Lantern, Projection Microscope, Reflecting Lantern, Moving Picture Machine, by Simon Henry Gage and Henry Phelps Gage, Ph.D. Ithaca, New York, Comstock Publishing Company. 1914. page 86. |
Author | H. Hubbell, Inc. |
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[edit]Public domainPublic domainfalsefalse |
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current | 06:41, 9 February 2008 | 751 × 1,249 (131 KB) | DavepapeBot (talk | contribs) | ==Summary== {{Information |Description=caption: "Fig. 48 A. Wall Receptacles with Separable Cap. Wall receptacle with the connecting prongs polarized so that the cap can be put in only one way, thus avoiding change of polarity with direct current." |Sou |
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