226 <j en. Roy’s Account of 
feries of triangles was extended along the ffiore of the Medi- 
terranean Sea, between Cette and St. Vi&oire, the extreme 
ftations from whence the light was repeatedly obferved, ns 
fired at the church of St. Maries, nearly in a central fituation, 
at the mouth of the lefler branch of the river Rhone. 
From the refult of this operation, the beft of the kind that 
has ever been executed in any country, it appears, that a degree 
of longitude in that latitude meafures 44355.7 fathoms; 
whence it follows, that the degree of a great circle, perpendicular 
to the meridian there, muff contain 61182} fathoms, being 
65} fathoms lefs than the degree in the middle of Kent, lati- 
tude 5 1° 6 7 50". 
Now, if we compare this difference with that found between 
the correfponding degrees of great circles for the fame latitudes 
on M. Bouguer’s hypothesis, we Shall find them perfectly 
confiflent with each other in their rate of diminution : for, by 
con Suiting the table, it will be feen, 'that this degree in lati- 
tude 51 0 6 7 5c/ 7 exceeds that in latitude 43 0 32' by 64.7 fa- 
thoms, agreeing within lefs than a fathom with the former 
difference. 
On due confederation of fo many corroborating circum- 
stances as have been adduced in the courfe of this fe&ion, 
there feems, therefore, to be Sufficient room to conclude, that 
the earth differs but little either in its figure or dimenfions from 
what hath been affigned to it by M. Bouguer. It is true, in- 
deed, that a new fpheroid has been here prefented, Somewhat 
lefs flat than the former, founded immediately on the Britifh 
observations ; and thefe being again compared with the refult 
of the above-mentioned operation, whereby the degree of lon- 
gitude in the South of France was determined, it is from the 
combination of both refults that the annexed table of the 
lengths 
