File:Senator John Heinz History Center - IMG 7824.JPG
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Summary
Exhibit in the Senator John Heinz History Center, 1212 Smallman Street, Pittsburgh, Pennsylvania, USA. There were no restrictions on photography in the museum collections. Thacher cylindrical slide rule, circa 1890; patented in 1881 by Edwin Thacher (1839-1920).
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:59, 6 January 2017 | | 3,264 × 1,304 (1.31 MB) | 127.0.0.1 (talk) | <p>Exhibit in the Senator John Heinz History Center, 1212 Smallman Street, Pittsburgh, Pennsylvania, USA. There were no restrictions on photography in the museum collections. Thacher cylindrical slide rule, circa 1890; patented in 1881 by Edwin Thacher (1839-1920). </p> |
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