140 DETERMJNJflON of the LATITUDE 



LETTER II* 



Dear Sir, Aberdeen, loth September 1796. 



AVING finifhed. the comparifon of a conliderable number 

 of obfervations, made in this place, in order to determine 

 its longitude, with correfponding obfervations made at Green- 

 wich, I now fend you the feveral refults. The obfervations ufed 

 for this purpofe are, eclipfes of the fatellites of Jupiter, particu- 

 larly thofe of the firft and fecond fatellites, folar and lunar eclip- 

 fes, occultations, i^c. Thefe obfervations were made with one 

 of Dollond's three and a half foot achromatic telefcopes, and 

 powers of about feventy, and one hundred and fifteen, were ap- 

 plied to the telefcope, according to circumftances. The obfer- 

 vations at Greenwich were made with one of Dollond's for- 

 ty-fix inch achromatic telefcopes. 



As the refults, deduced from a comparifon of the correfpond- 

 ing obfervations of the firft and fecond fatellites of Jupiter, arc 



much 



* Communicated 7th November i795» 



