File:Phosphorus Furnace by G.C. Landis.jpg
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English: Design for an electric arc furnace to produce phosphorus from 1907 patent by G.C. Landis. |
| Date | |
| Source | book: The Electric Furnace: Its Construction, Operation and Uses By Alfred Stansfield (1914) |
| Author | G.C. Landis |
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This file is in the public domain because It is a patent and also out of date for copyright
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. 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. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 20:38, 12 May 2014 | | 576 × 563 (46 KB) | John Chamberlain (talk | contribs) | {{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|Design for an electric arc furnace to produce phosphorus from 1907 patent by G.C. Landis.}} |Source = book: The Electric Furnace: Its Construction, Operation and Uses By Alfre... |
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