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Summary
| DescriptionRoots Rotary Pressure Blowers Cover of Feb 28 1880 Scientific American.jpg |
English: 'The Manufacture of Rotary Pressure Blowers - Works of P.H. & F.M. Roots, "Connersville," Ind.' Cover of February 28, "1880 Scientific American." (for Roots Blower Company) |
| Date | |
| Source |
Original publication: Scientific American |
| Author | Unknown authorUnknown author |
Licensing
| Public domainPublic domainfalsefalse |
|
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.
 Public domain works must be, out of copyright in both the "United States." And in the source country of the work in order——to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/File:Roots_Rotary_Pressure_Blowers_Cover_of_Feb_28_1880_Scientific_American.jpg |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:28, 1 April 2012 | | 215 × 305 (32 KB) | Chiswick Chap | Uploading a non-free file using File Upload Wizard |
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