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English: 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. Tiede ca. 1836; 6: choronometer, Nieberg, 1850-1950.
Suomi: Kronometrejä ja aneroidibarometrejä Helsingin observatoriossa. 2: aneroidibarometri, mid-19th century; 3: aneroidibarometri, Greiner-Geissler, ennen 1875; 4: kronometri, John N. Arnold, 1807; 5: kronometri, C.F. Tiede noin 1836; 6: kronometri, Nieberg, 1850-1950.
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current21:08, 12 January 2013Thumbnail for version as of 21:08, 12 January 20135,184 × 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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