Astronomical Observation; Made in the Voyages Which Were Undertaken for Making Discoveries in the Southern Hemisphere, and Successively Performed by Commodore Byron, Captain Wallis, Captain Carteret, and Captain Cook in the Dolphin, Tamer, Swallow, and E
Astronomical Observation; Made in the Voyages Which Were Undertaken for Making Discoveries in the Southern Hemisphere, and Successively Performed by Commodore Byron, Captain Wallis, Captain Carteret, and Captain Cook in the Dolphin, Tamer, Swallow, and E
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1788 Excerpt: ...and 39' 5," all in excess; and the mean error, 53' -9" in excess. In all these the sun was east of the moon. On the 1 ith, 12th, and 14th of February, the sun being then west of the moon, the mean results of observations, taken these days, were 890 9'9" west, . 890 57' 42" west, and 9-10 2' 48" west, Captain Cook's ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1788 Excerpt: ...and 39' 5," all in excess; and the mean error, 53' -9" in excess. In all these the sun was east of the moon. On the 1 ith, 12th, and 14th of February, the sun being then west of the moon, the mean results of observations, taken these days, were 890 9'9" west, . 890 57' 42" west, and 9-10 2' 48" west, Captain Cook's reckoning. gave 87 0 51' 3" west, 890 29'40" west, and 9i024' 24" west, at these times; consequently, the errors of the reckoning are 77' 39," and 28' 2" in defect, and. 21' 36" in excess, and the mean of them is 28' 2" in defect: the mean of these two means, or 12' 39" too much, I shall conclude was the real error of Captain Cook's account in longitude on the 6th of February at noon;. which was the day of the full-moon. The medium of the observations which were made on the 26th of February is 1090 3'oo"west, and of those which were taken on the 27th Io9,055' 2o"W.;, Captain Cook's reckoninggave no0 20' 00" west, and 1 io0 32' 17" W. at these two times; consequently, the two errors are 76' 00," and 36' 57" in excess, and the mean of them 56' 58" in excess. The mean of this mean and the. error when the sun was west of the moon, is 14' 28" in excess. And by this quantity I suppose Captain Cook's reckoning exceeded'the truth on the 20th of February, which was the day of the new-moon. The The result of the observations which were made on the 12th of March is 1250 6' 30" W. The mean result of those which were made on the 13th of March is 1260 4' 5" west, on the 15th 1260 33' 30" west, on the i6th, 1270 o' 56" west, and on the 18th, zy0g' 56" W.: Captain Cook's reckoning at these five times, was 1240 40'26" west, ...
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