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current | 21:08, 12 January 2013 | 5,184 × 3,456 (6.76 MB) | MKFI | {{Information |Description ={{en|1=Chronometers and aneroid barometers in Helsinki observatory. 2: aneroid barometer, mid-19th century; 3: aneroid barometer, Greiner-Geissler, before 1875; 4: chronometer, John N. Arnold, 1807; 5: chronometer, C.F. T... |
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