2Q2 Gen. Roy’s Account of 
the earth, than any of the others with which it was com- 
pared. 
In proof of this, we need only for the prefent remark, 
what will be made fully to appear hereafter, that the diftance 
between the parallels of Greenwich and Dunkirk, or Green- 
wich and M, being now added (by our trigonometrical opera- 
tion) to the meafured length of the meridian of France, the 
meafured and computed fedtions of the united meridian will be 
found to agree almoft exadtly at Paris ; that the excefs of the 
meafurement is but of the value of 3" or 4" at Bourges; only 
of b" at Rodes ; aud even as low down as Perpignan, com- 
prehending in the whole an arc of the heavens of more than 
8°j, the excefs is not greater than what would anfwer to be- 
tween 16" and 17", the chief part of which is probably ow- 
inv to the attraction of the plummet of the fedtor by the Py- 
renees. In the Paper of 1787, the effeCt had been a {Turned at 
a quantity equal to about 10". But every thing on this head 
muft be confidered as merely matter or fuppofition, which 
cannot be determined one way or other until triangular mea- 
furements fhall have been extended beyond the Pyrenean moun- 
tains into Spain, and correfponding obfervations of the ftars 
made on both fides with the fame inftrument, which mould be 
one of the beft that could poffibly be invented for the purpofe. 
In the mean time, fince the French have rejefted their own 
obfervations at Perpignan, we (hall avoid drawing any conclu- 
fions with regard to latitudes from the obiervations to the 
fouthward, and confine ourfelves to thofe immediately con- 
nected with our operation, made at the northern ftations of the 
meridian. 
In carrying on the trigonometrical operation, it never was 
propofed that we (hould attempt to determine the latitudes of 
the 
