[ *?9 1 
lation. He infinuates, that it may poffibly be more 
denfe towards the 'Centre than at the Superficies. 
(See Art. XXIV. following) I am fomething fur- 
prized that Sir JJaac. fhould imagine, that the Sun's 
Heat can be fo great at J upiters Equator, when it 
has no fuch Effed at that of the Earth; and that he 
*does not aferibe each to a like Caufe, by fuppofing 
alfo, that Jupiter mzy be of a different Denfity at the 
Centre from that at the Superficies. 
But whatever Reafon he might have for introducing 
two different Caufes, I give the Preference to the 
Hypothefis which fuppofes unequal Denfities at the 
Centre and at the Circumference. I have inquired, 
by the Affiftance of this Theory, what would be the 
Figure of the Earth, and of the other Planets which 
revolve about an Axe, on Suppofition that they are 
compofed of fimilar Strata , or Layers, at the Surface $ 
but that their variable Denfity, from the Centre to- 
wards the Circumference, may be expounded by any 
Algebraical Equation whatfoever. 
And though my Hypothefis fhould not be conform- 
able to the Laws of Nature, or even though it fhould 
be of no real Ufe (which would be the Cafe, if the 
Obfervations made by the Mathematicians now in 
*Peru, compared with ours in the North, fhould re- 
quire that Proportion of the Axes, which is derived 
from Sir Ifaacs Spheroid) $ I thought however that 
Geometricians would be pleafed with the Speculations 
contain'd in this Paper, as being, if not ufeful, yet 
.curious Problems at leaft. 
N n & 
Fait 
