[ 8 ° ] 
In the nrft place, I will alk of Father Frifius, if, 
before the operations, which I depended upon, were 
performed, I could eftablifh any thing againft their 
agreeing, or not, with Sir Ilaac’s proportion about 
the fame matter ? 
He perhaps will anfwer, That my remark of the 
LXIX art. But ij the diameters were found undoubt- 
edly in a greater ratio to one a?iotjoer than 230 to 231, 
imports, that I was not thoroughly convinced, that 
what care foever would be taken by the gentlemen 
fent into Peru, they never would be able to meafure 
their degree with a fufficient exadtnefs, to conclude, 
from its length, compared with that of the other de- 
grees, whether the diameters were in a greater or lefs 
ratio than 2^0 to 231 j and confequently he will 
think, that my being in fulpenfe about it was an 
offence againft Sir Ifaac’s theoretical determination. 
Then, 1 requeff Father Frifius to tell me, why 
he is fo good as to commend operations fo void of 
ufe as thole, which tended only to difcover what was 
demonftrated before, and needed not to be confirmed, 
fince it could not be invalidated. 
Perhaps Father Frifius, in reprefenting me as de- 
pending too much upon the obfervations, relied on 
thefe expreffions of the LXIX art. As the meafures 
of the gravity cannot agree with the fuppo fit ion of the 
homogeneity : and I confefs, that it feems to me im- 
poffible to reconcile the great number of all the mea- 
fures of that fort with the table, which follows the 
homogeneity. For the fimplicity of the means made 
ufe of F the performance of thofe .mealures cannot 
admit the errors, which fhould be fuppofed to bring 
them to Sir Ifaac’s theory: but as this theory is founded 
on 
