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XLIX. Extra& of a Letter from Mr . John 
Winthrop, Profejfor of Mathematicks in 
Cambridge, New England, to James 
Short, A . M. F. R . S. 
SIR, Dated June 6, 1764. 
Read Nov. 1 5 , TT AM greatly obliged to you for your 
*7 6 4- candid and judicious remarks on my 
obfervation of Venus on the Sun, which I received 
from my much-efteemed friend Dr. Franklin. X 
wrote to the Dr. pretty largely on the fubjeift, which 
I defired him to communicate to you : but when I 
had the pleafure of a vifit from him laft fummer, he 
could not recolledt whether he had done it or not. 
I therefore beg leave now to trouble you with the fub- 
ftance of it. Your remarks turned on two points, 
the longitude of the place of obfervation, and the 
equation of time when found by equal altitudes. As 
to the firft, I was fo diffident of the obfervation on 
the Moon, that I chofe to keep to the longitude of 
St. John’s, as fet down by Sir JonasMoore, who makes 
it 52 0 50' Weft of Greenwich. Though I did not 
think it needful to mention this doubt in the pamph- 
let, which was publifhed foon after I got home, to- 
gratify the curiofity of my countrymen, yet I ex- 
preffed it fully in a written account of the obfervation, 
drawn up in a different form, and fent to the late 
Dr. Bradley, but which I believe never reached his 
hands. 
As- 
