68 



ASTRONOMICAL OBSERVATIONS 



by ftars that pafs over the zenith, and by others north 

 and fouth, and by equal altitudes; all which fhewed it 

 was as nicely in the meridian as it well could be. 



In 1 779? on the 3d of March, I obferved * and p Ge- 

 minorum, and the deviation was the fame as that de- 

 rived from the tranfits of the fun on the 23d February 

 and 5th March. In the obfervation of the moon 23d 

 November following, the accuracy of its pofition was 

 afcertained, fo that the times were correci ; and the er- 

 rors depend on fomething at the Satellite and planet. 

 Perhaps Jupiter % atmofphere may be fo denfe as to 

 prevent the free paffage of the diminifhed light foon 

 after the beginning of an eclipfe, or even before it. 

 If fo, thefe obfervations may tend to clear up that 

 point, and to meafure the extent of that atmofphere. 



1778, 4th Feb. 



i779> 23d do. 



2d March 

 9th do. 

 nth do. 



1780, 13th March. 



Afferent Time 

 corrtfl. 



H. M.S. 



9.02.51,0 

 10.58.15 

 12.53.08 



7- 20 -35>3 



10.10.47,7 



Ephemerit ■ 



H.M.S. 



1.58.08 

 3.10.01 

 5.05.17 

 7.01.07 

 1.30.10 



4.20.23 



Thefe two were obferved 

 at Dumdum; but the 

 time was taken from 

 the tranfit inftrument 

 by a watch, carried 

 out before, and back 

 after, and compared 

 with the clock. 



All thefe obfervations were made with Dollond's 

 triple objeci glafs. 



Obfervations of Venus. 



1776, 2d January, at 7b. 55', in the morning, I mea- 

 fured the diftance between Venus and the Sun 46 32'. 



I was 



