C ]. 
the Inequality of Denfity, proceeding from the Centre 
towards the Circumference, which would all agree 
with the Figure obferved, and which are very eafy to 
calculate by the Principles here laid down. 
As to what concerns the Earth, I fhall wait till we 
receive the Obfervations which muft have been lately 
made in 5Pm/; that by comparing thofe with what 
Obfervations we have made under the ar&ick Circle, 
and with thofe of Mr. Tic art in France , we may have 
the true Difference of the Earth's Diameters at the 
Equator and at the Poles. Then our Theory may be 
apply'd, to determine whether the Earth is more ot 
lefs denfe at the central Parts than at the Surface, or 
whether it be every-where of an uniform Denfity, as 
it ought to be, if (without admitting very grofs Er- 
rors in the Obfervations) it may be concluded, that 
the Earth is really the Spheroid of Sir If aac Newton 
and this Cafe would be the fimpleft and the moft natural 
of all. 
I am here obliged to acknowledge, that if the Ob- 
fervations we have made in the North may be rely'd 
upon, and if we muft admit as inconteftable as well 
the Meafure of a Degree as the Length of the Pendu- 
lum, the foregoing Theory could not be reconciled' 
to the Thanomena. For it follows from our Obfer- 
vations, that the Diameter of the Equator muft exceed! 
the Earth's Axis by more than ~ Part : And that the 
Gravity at the Pole muft be greater than that at the 
Equator by more than Part likewife $ which will 
by no means agree with what we have deduced im 
Art XXIII. 
As to what concerns the Meafure of Gravity in 
Lafland, as being not fo liable to Error as the mea^ 
Turing 
