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| #4822 | Antique french barometer, silvered brass plates, signed:'par Geret, Ing-Opticien à Macon'. ca 1820 | |
| Antique french barometer, silvered brass plates, signed:'par Geret, Ing-Opticien à Macon'. ca 1820
Barometer with adjustable height (for sealevel and mountains), 2 thermometer scales and mercury gilded ornaments. |
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