[ 420 } 
Remarks by the Astronomer Royal. 
From the data given above, and the length of 
a degree of latitude, found by Meffieurs Mafon and 
Dixon, in thefe parts = 68,896 Englifh miles, the 
difference of latitude of Leweftown and the Middle 
Point above mentioned (which is the fame with 
the point A; fee Meffieurs Mafon’s and Dixon’s 
meafure of a degree, Philof. Tranfadt. vol. LVIII. 
p. 276) is 1 9' 53'' ; but the latitude of the point A 
was found, by Meffieurs Mafon and Dixon 38° 27' 
34'''; therefore that of Leweftown is 38^* 47' 27'' 
north 5 and the difference of its meridian, and that 
of the point A, or their difference of longitude, is 
34^0'^ =2' 16^' of time, Leweflown being to the 
eaft. But if the difference of longitude of Lewef- 
town eaft of the Stones on Fenwick’s Ifle be fup- 
pofed truly given, in the former account, 5' 45" of 
a degree, then the difference of longitude of Lewef- 
town and the point A will come out about of a 
degree, or. 4^' of time lefs ; for Mr. Dixon acquaints 
me, that the diftance of the Stone on Fenwick’s Ifle, 
eaft of the point A, is 35 Fnglifh miles wanting 
joo yards. Now this is equal to 30' 26'' of a 
great circle = 38' 51'^ of longitude; from which 
fubtradfing 5' 45'', there remain 33^ 6'' for difter- 
ence of longitude of Leweftown and Point A 
2' 12'''! of time, or 3'^! lefs than found before;, 
and this latter I takfi to be neareft the truth. If 
this be fo, Leweftown is very nearly under the fame 
meridian with the fouthernmoft part of the city of 
Philadelphia, or more accurately 1 3'' of longitude, 
anfweri ng 
