March.
On the 25th of febiuary Mr. Whidbey obferved the immerfion of Jupiter's firfl fatellite, this gave the longitude, differing 7' 45" to the weftward of the lorgitrule by Cap- tain Cook, and correfponding with that deduced by Mr. Bailey from two eclipfes. Latitude of the obfervatory by fix meridian altitudes of the fun correfponding with Captain Cook' , The following lunar obfervations for afcertaining the longitude were made for the purpofe of fliewing the agreement between our inflruments and thofe of Captain Cook. Mean of thirty-two fets taken by Mr. Whidbey, Ditto twenty fets taken by myfelf. Ditto fixteen fets taken by Mr. Orchard, Mean of the above fixt)'-eight fets coUeftively taken, 203-52 l,r, _// ig 28 204 4 21 203 52 27 203 57 54 But allowing the longitude, as fettled by Captain Cook, to be 204°, Kendall's chronometer in that cafe appeared to be fall of mean time at Greenwich at noon on the ^t.li of march, . _ - - And gaining per day at the rate of, Arnold's on board the Chatham, fall of mean time at Gieenwich, - - . _ - And gaining per day at the rate of, Arnold's No. 1 4, fad of mean time at Greenwich, And gaining per day at the rate of, Arnold's No. 176, ditto ditto And gaining per day at the rate of, Earnfhaw's, ditto ditto And gaining per day at the rate of. The variation by four compaffes in thirty-one fets of azimuths, differing from 5° 47' to 9* 47', gave the mean refult, .... h 42 27 23 <• 8 52 5 11 58 23 35 59 1 24 20 23 15 29 3 42 14 23 43 37 1 22 3^5 23 17 22 /-a / 47 m The
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