of the Trigonometrical Operation. 6<$y 
the meridian of Greenwich (in the Table of General Refults) 
have been converted into degrees, &c. according to this Ta- 
ble ; and the others from the perpendicular in the next co- 
lumn, according to M. Bouguer’s fcale on the meridian 
(which is had fufficiently accurate from the Table, p. 298. Fig . 
de la T, or that at p. 228. Phil, Tranf. 1787, by an eafy 
approximation) thefe meridional arcs applied to the co- latitude 
of Greenwich, with the other arcs perpendicular to the meri- 
dian, form the legs of the triangles by which the latitudes and 
longitudes of the Rations have been computed. The meri- 
dional arcs, however, have been corrected, as in the example 
in this Article (where the value of R r has been added) when 
the diflances of the Rations from the meridian of Greenwich 
are confiderable. 
In determining the latitude of M in this Article, a fpheroidi- 
cal correction has been applied to the refult by fpherical trigo- 
nometry, as in Art. VII. but that computation is made on a 
figure of known dimenfions, and confequently the latitude of 
r (%• 7-) Is given; but it does not follow, that the true lati- 
tude of r (fig. 10.) would exactly correfpond with M. Bou- 
guer’s hypothefis, though the length of the whole meridional 
arc between Greenwich and Paris is found to agree extremely 
near ; and therefore no correction of this kind is applied to the 
other latitudes in the Table of General Refults. 
The greateR accuracy, however, is abfolutely neceflary in 
determining the directions of the meridians if we would derive 
fatisfaCtory conclufions therefrom, when the places of obferva- 
tion are obliquely lituated with refpeCt to the meridian, and at 
a diflance from each other not greater than that between Botley 
Hill and Goudhurfl, becaufe an error of \ !/ in the horizontal 
angle at either of thefe places will produce an error in their 
difference 
