File:DeZeng's Phoro-Optometer of 1917.jpg
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Summary
| Description |
English: DeZeng's Phoro-Optometer of 1917. DeZeng Standard Co., Camden, NJ |
| Date | |
| Source | "The Modern Phorometer" by Henry DeZeng, self published, Camden, NJ, 1917 |
| Author | Henry DeZeng |
Licensing
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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.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:32, 29 October 2014 | | 1,029 × 1,036 (714 KB) | DigbyDalton | User created page with UploadWizard |
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