( ) 
quejlioned Obfet' vat ions and Experiments accurately 
made ; nor even by tbofe 'Principles which He (M. Mai- 
ran) has ajfum'd to ferve his intended Purpofe — That 
his Demonfirations relating to the 'Difference of the A- 
61 ion of the Centrifugal Force , are of no Service to him , 
for reconciling the Experiments made on Pendulums , 
with Alonf LdtiiiVi’s Meafures \ — becaufe , when ap- 
plied to Sir lfaac Newton’s Principles , they will 
make Pendulums longer at the JEquator than at Paris, 
and when applied to Monf Mair-mV own Principles , 
they will make them a whole Inch fhorter at the M- 
quator than at Paris, contrary to all Obfervations , 
which, at a Medium, make Pendulums but about two 
Lines or -i* tof an Inch longer at the FEquator than 
at Paris. '—That he has built his 'Demonjl rat ions 
upon a wrong Notion of Gravity — And that he has 
, not coupler' d what is moft material in the Effelt of 
the Centrifugal Force , ailing on Bodies defending 
by their Gravity, between the Adquator and the 
Poles, namely, the Alteration of their Line of Di- 
re 61 ion, which wou'd make them fall out of the Per- 
pendicular towards the A^quator. 
I (hall add one more Philofophical Argument, given 
me by a Friend, to whom I communicated my Thoughts 
on this Subject j becaufe it is wholly independent on 
thofe Principles of Philofophy, concerning which, fome 
of the Gentlemen that believe the oblong fpheroidical 
Figure of the Earth, and the Englifh Philofophers, are 
not yet agreed ; and it is this. 
If the Earth was of an oblong fpheroidical Figure, 
higher at the Poles than the JEquator ^ the Axis of 
its Be vo hit ion, wou'd either go thro one of its jh or t 
Diameters , or be continually changing, unlefs the 
faid Axis did exalt ly coincide with toe Axis of the 
F * me - • DE- 
