File:Pressey Testing Machine 2.jpg
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Interior of Pressey Testing Machine showing punchcard answer key.
Patent dates 1928 and 1930.
Exterior view also available.
Photograph by User:Gomer Bolstrood, September 7, 2006.
Released to the public domain.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:10, 9 September 2006 | | 1,692 × 1,405 (1,010 KB) | Gomer Bolstrood (talk | contribs) | Interior of Pressey Testing Machine showing punchcard answer key. Manufactured circa 1930. Photograph by User:Gomer Bolstrood, September 7, 2006. Released to the public domain. |
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