VOL. LXIV.] PHILOSOPHICAL TRANSACTIONS. 527 



1768, Jan. 29.. immer. 1 13" 57'" 47' apparent time. 



14 

 7 



10 

 26fx.B. In these 2 emersions the satellites seemed to 



8 I emerge slowly out of the shadow. 

 ^„ c This is the best observation, the satellite starting out 



1 instantaneously. 

 54 

 43. 



XXIII. Astronomical Observations made by Samuel Holland, Esq., Surveyor 

 General of Lands for the Northern District of North America, for ascer- 

 taining the Longitude of several Places in the said District, p. 182. 

 Kittery Point, in the province of Main, in Piscataqua harbour. 

 The latitude by repeated observations, 43° 4' 27" n. 



Observed, with DoUond's 1 2-feet refracting telescope, immersion and emer- 

 sions of "y's satellites as follow. 



Apparent time. 

 1771. April 11th, an immersion of the 1st, at \b^ 43™ SC 



27th, same same 14 1 43 



May 4th, same same 15 55 54. 



The variation of the compass at this place, is 7° 46' west. 

 Portsmouth, province of New Hampshire, the latitude by repeated observa- 

 tions, 43° 4' 15* N. 



Observed, with Dollond's 1 2-feet refracting telescope, immersions and emer- 

 sions of ■y's satellites as follow. 



Apparent time. 



1772, Sept. 6th, an emersion of the 2d, at 11" 



18th, same 1st 9 



Oct. 1 1th, same same 10 



Nov. 3d, same same 10 



9th, same 2d 10 



1 2th, same 1st 6 



19th, same same 8 



23d, immerged entirely, 3d 6 



same began to emerge. . same 9 



Dec. 4th, an emersion 2d 7 



5th, same 1st 6 



The variation of the compass at this place is 7° 48' west. 



XXI f^. Observations of Eclipses of Jupiter s first Satellites made at the Royal 

 Observatory at Greenwich, compared with Observations of the same, made by 

 Samuel Holland, Esq., and others of his Party, in several Parts of North 

 America, and the Longitudes of the Places thence deduced. By the Astrono- 

 mer Royal, p. 1 84. 

 The result of those comparisons, give the following longitudes of the places 



of observations. 



