[ 421 ] 
anfwering to \ of time, eaft of it. For, by Meflieurs 
Mafon’s and Dixon’s meafure of a degree, the point 
N (fee Philof. Tranfad. Vol. LVIII. p. 276) is 
2' 19^^ of longitude weft of the point A 5 and 
N, by meafurement, is 3 1 Englifh miles due weft of 
the fouthernmoft part ot the city of Philadelphia, an- 
fwering to 35' 12'^ of longitude; from which fub- 
trading2' 19 ^ there remain 32' 53'^ anfwering to 
2! 1 \"\ of time, for the difterence of longitude of 
the fouthernmoft part of Philadelphia, eaft ol the 
point A. But Leweftown is found above to be 
33' of longitude — 2' i2''| eaft of the point A, 
and confequently is 13^' of longitude, or about ^ 
of time eaft of the fouthernmoft part of the city of 
Philadelphia. 
Nevil Mafkelyne. 
LX. Ohjer- 
