File:Punchcard3.jpg
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Figure 3. Pantograph punch used for the 1890 census (U.S. Patent 487,737).
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:38, 7 January 2013 | | 1,845 × 982 (1.2 MB) | Administrator1 (talk | contribs) | |
| 15:43, 13 November 2009 |  | 327 × 192 (17 KB) | Nbrewer (talk | contribs) |
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