of the Trigonometrical Operation . 6 i 3 
Hence Greenwich Qbiervatory from Limehoufe Church is 
13999 feet. 
Taking the fum of 111 0 56' 50" (in the VIII triangle, p. 
I 73 *) ^ 2 ° 4 1 1 a ^d 1 34° i6 7 31" from 360° there remains 
3i°5 / 38 // for the angle at Greenwich Obfervatory between 
Limehoufe Church and St. Paul’s; this, with the including 
fides 13999 an d 25655 (neglefting the fra&ions) will give 
121 0 i / 42 x/ and 27 0 52/ 4c/ 7 , the other two angles* 
P. 257. in the 31. triangle, for 6511 put 6925.4. 
P. 259. The bearing of Greenwich from the meridian of 
St. Paul’s, on which the other bearings in the Table depend, 
was found as follows : 
Angle at Greenwich Obfervatory between its 
J o t tt 
meridian and Norwood . 38 7 16 
between Norwood and St. Paul’s 82 41 1.1 
Hence the angle at Greenwich Obfervatory be- 
tween the north meridian and St. Paul’s . 5911 42.9 
This laft angle, and its complement, with 25655! feet the 
diftance of Greenwich Obfervatory and St. Paul’s, give 13138.5 
for what St. Paul’s is north from Greenwich, and 22036 for 
what it is weft from the meridian. 
On M. Bouguer’s fpheroid 13138.5 feet anfwer to a". 5 
on the meridian ; hence the latitude of the point on the meri- 
dian of Greenwich, where a great circle, paffing through 
St. Paul’s, falls perpendicular on that meridian, will be 
5 1 3® 49 i • *md taking 61251 fathoms for a degree perpen- 
dicular to the meridian (fee Tab. p. 227.) we have (22036 feet) 
3' 35 "'$6 for the intercepted arc of that circle ; this, and the 
complement of 5i°3o'49 /, i (as the legs of a fpherical tri- 
angle) give 89° 55' 29" for the angle at St. Paul’s, which, 
added 
