[ * 9 ° ] 
XXV. Immerfions and Emerfions of Jupi- 
ter’s firf Satellite , obferved at Jupiter’s 
Inlet , on the If and of Anticofti, North 
America, by Mr. Thomas Wright, 
Deputy Surveyor General of -Lands for 
the Northern DifriSl of America ; and 
the Longitude of the PJace , deduced from 
Comparifon with Obfervations made at 
the Royal Obfervato'ry at Greenwich,: by 
the Afrronomer Royal, 
Redde ,Jan. 20,^1”^ HE S E obfervations were com- 
» 774 * munieated to me feme years ago 
by Mr. wright. They were made, as he informed 
me, at jupiter’s inlet, two leagues to the weft- 
ward of the fouth-weft point of the iflap.d of Anti- 
costi, fttuated at the entrance of the river st. Lau- 
rence, in latitude 49 0 26" North, with a two-feet 
reflecting telefcope of the late Mr. shor r’s confer uc- 
tion. The pendulum clock, made ufe of, vibrated 
half-feconds, and was regulated by equal altitudes of 
the fun, taken by reflection, from the furface of a 
fluid, with a hadley’s fextant of 18 inches radius, 
having a brafs arch and index, and ivory vernier, 
made by Meflieurs heath and wing. 
In 
