[ 3 « S ] 
XXL Determination of the Longitudes and Latitudes of fine 
remarkable Places near the Severn . In a Letter from Edward 
PigoU'j Efq> to Sir Henry C. Englefield, Bart . K R* S . 
Read May 20, 1790. 
A S perhaps this Paper may be thought of fome ufe, I beg 
you will do me the favour of preferring it to the Royal 
Society. Its principal objedl is to fettle the longitude and lati- 
tude of feveral remarkable places near the Severn, the relative 
diftances of which I meafured trigonometrically during my 
flay in Giamorganfliire. As they are all deduced from Frarap- 
ton-houfe, it is requifite to determine the pofition of' that place 
with corredtnefs. My father has already given its longitude in 
the Philofophical Tranfactions, Vol. LXXL being the mean 
of feveral obfervations of Jupiter’s firft and fecond fatelliteSo 
From the known ability of the obferver, we may undoubtedly 
depend that all poffible exa&nefs was obtained, of which thofe 
obfervations are fufceptible ; but at that time the fuperior accu- 
racy of the lunar tranfits was not known ; therefore at prefent 
there can be no hesitation in giving the preference to the fol- 
lowing refults. 
Vol. LXXX. 
E e e 
Difference 
