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an etteemed attronomer and ingenious mechanic of 
Penfylvania, made ufe of ir, and 1 , of bird’s; when 
we never found them to differ more than 1 7 
which furprized that gentleman much, to find an 
inftrument, of fuch ftnall dimenfions, executed with 
that accuracy, as to equal fo nearly his large zenith 
infirument, which aifo is of bird’s workman fbip. 
'I have found the latitude of the entrance of this 
harbor to be 43” 5'' o ", though it is in general laid 
down in 43 0 20', and, in fame maps, 26': and for 
the charts of thefe coafts, they have but little refem- 
blance to what they fhould exprefs. 
Plow Mefli Wright and Sproule came to ne- 
gleft the equation of correfpondent altitudes, I 
cannot otherwife account for, but, that they muff 
have wanted tables to work by; as before they went 
011 thefe obfervations, I had made ufe of M. 
de la lande’s tables, and before I was matter of 
his,d ufed thofe calculated by m. maraldi, which, 
though not fo exadt as the former, are very near. 
Mr. Sproule’s reafon for bringing his obfervations 
to equal or mean time, was for convenience, as the 
timepiece he had, conftrudted by mudge and dut- 
ton, was eafily brought to it, and is made on the 
fame principles with that time piece, I always ufe, 
conftrudted by the late Mr. graham, which keeps 
going for a month, and, when winding up, continues 
going by a fpring. 
M. st. germain, a prieft of the Roman church, 
and who is ftiled, in the feminary, Le prof ejfeur en phi - 
lofophie, had been fome time with me, pradtiling him- 
felf in the ufe of the telefcope, at Jupiter’s fatellites ; 
.and, fome days before the tranfit, he was frequently 
6 trying 
