. Appendix to Captain Parry's journal of a second voyage [microform] : for the discovery of a north-west passage from the Atlantic to the Pacific, performed in His Majesty's ships Fury and Hecla in the years 1821-22-23. Science; Botany; Sciences; Botanique. AT THE WINTER STATIONS, 1S22â3. mi the following are the results, leaving out those chronometers whose rates, from their irregularity, were not to be depended upon. % 11 Chronometers in the Fury, taking a mean of laat fortnight's r&ies B3' the same, taking a mean of the last month/ rates By 8 Chronometers in the Hecla . . By 6 â in the
. Appendix to Captain Parry's journal of a second voyage [microform] : for the discovery of a north-west passage from the Atlantic to the Pacific, performed in His Majesty's ships Fury and Hecla in the years 1821-22-23. Science; Botany; Sciences; Botanique. AT THE WINTER STATIONS, 1S22â3. mi the following are the results, leaving out those chronometers whose rates, from their irregularity, were not to be depended upon. % 11 Chronometers in the Fury, taking a mean of laat fortnight's r&ies B3' the same, taking a mean of the last month/ rates By 8 Chronometers in the Hecla . . By 6 â in the Fury . . By 3 â in the Hecla . . 4 4 4 Proceeding from Win- â ter Island to Igloolik, interval 25 days. 5 ^ Returning interval 26 5 Sdays. By a mean of the determinations upon leaving and returning to Winter Island, the difference of longitude by the Fury's chronometer is 4"' 56'.8, and by the Hecla's chronometers, 4" 59'. The diflference between the meridians, therefore, by the chronometers, is 4" 57' very nearly, which agrees within 1'.5 of that by the eclipse of the satellites of Jupiter, which were observed with a 45 inch achromatic telescope, with a triple object glass by DoUond. The times of immersion and emersion are taken from the Connaissance des Terns, allowing 9"" 20' for the difference of the meridians of Greenwich and Paris. The only corresponding observation of the satellites I can find made upon a known meridian, is an immersion of the second satellite, which was observed at Greenwich, with a similar telescope, on the 16th of November, 1822, at 15" 21" 7'.4 mean time; the same was observed by myself at the observatory at Igloolik, at 9" 53⢠25', which makes the longitude 5" 27'" 42'.4 W. By com- paring three observations made at Greenwich on the 8th, 22d, and 29th of October, 1822, the observed times are respectively 6, 17, and 6 .seconds less than the times as computed from the al
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectscience, bookyear1
