File:Robertson screw ad.jpg - Wikipedia
- ️Fri Jan 01 1909
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:01, 22 October 2008 | | 600 × 363 (68 KB) | Mzajac | {{Information |Description={{en|1=Promotional card for the Robertson screw, which promotes the invention as the most recent advancement on Archimedes' screw}} |Source=[http://www.collectionscanada.gc.ca/cool/002027-2008-e.html Collections Canada] |Author= |
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| Orientation | Normal |
|---|---|
| Horizontal resolution | 150 dpi |
| Vertical resolution | 150 dpi |
| Software used | Adobe Photoshop CS Windows |
| File change date and time | 14:59, 28 April 2005 |
| Color space | Uncalibrated |