of Cambridge in New England. S °7 
tude by obfervation. By mayer’s tables her latitude w^s then 
49' by which it appears, that the error ot thefe tables 
in latitude, at the middle of the eclipfe, by the Penobfcot ob- 
fervation, was -io"4. The error in longitude, taking the 
mean between that of the beginning and end, I find to be 
- 9". The determination of thefe errors is upon the fuppofii- 
tion that Beverly is 4I1. 42 ; W. of Greenwich, which, I 
believe, very near the truth. Beverly appears by obfervation 
to be T 18" in time E. of Cambridge, which fubtra&ed from 
4I1. 44' 1 7" leaves 4I1. 42' 59". 
I hope, Sir, no umbrage will be taken at my writing to you, 
on account of the political light in which America is now 
viewed by Great Britain. I think political difputes fhould not 
prevent communications in matters of mere fcience ; nor can I 
fee how any one can be injured by fuch an intercourfe. 
I am, 6 cc, 
BevQrly in Maffacliufetts, 
February 16, 1781. 
