87 



ASTRONOMICAL OBSERVATIONS 



The fame day Lieutenant Humphreys obferved with 

 a fextant made by R amsden, about four inches radius : 

 he made the angles of the lower limb 1 \S°,oc) / .oo n ; and 

 the error of his quadrant was — 2', which gave the lati- 

 tude i6°.n / .05 // . This was intended as a kind of teft 

 of the inftruments, but it was not a fair one, and yet the 

 refult is clofer than could be expected, confidering the 

 difficulty of reading the fmall one. 



Mean of three latitudes with octant i6°.io'.32" 



On Meridian, 061.29th, 



By the fmall watch 3° j 



Nov. ill, 



OC.O4.56 toofaft 4.56* 

 00.08.36,5 8.36,5 



00.12.37 12 -37 



00.16.36,5 16.36,5 



Examination of the large watch ufed at the obfervation 

 of Jupiter's Satellite. 



29th October, altered the fpring, and fet it a-going 

 at one o'clock. 



Small Watch. 



h , . 



Octo. 29th 22.37.00 

 Too fait 8.23,2 



Solar time 22.28.36,8 



Nov. lft 1 1.46.00 



Too faft 0.16.54 



Solar time 1.29.06 



Large Watch. 



1 a 1 // 



22.34.42 too faft 6.05,2 



*-35-57>5 toofaft 6.51,5 



Therefore in 51 hours folar time the large watch 

 gained 46 ,/ ,3. 



An 



