( 4f» ) 
Now by the Hypothefis it is evident, that the Water 
in 2, biing nearer, is more drawn by the Moon, than 
the Center of the Earth C, and that again more tha 
the Water in N, wherefore the Water in 2. has a ten-, 
dency towards the Moon, contrary to that of Gravity,^ 
being equal to the Excefi of the Gravitation in 2, above, 
that m C : And in the other cafe, the Water in tend-, 
ing lefs towards the Moon than the Center C, will be, 
leis prefred,by as much as is the difference of the Gravk 
tations towards the Moon in C and /ST. This rightly un-* 
derftood, it follows plainly, that the Sea, which othern 
wife, would be Spherical, upon the Preffure of the. 
Moon, muftform it feif into a Spheroidal or Qval Fi- 
gure, whofe longed Diameter is where the Moon is 
Vertical, and Oiorteft where (he is in the Horizon; and 
that the Moon ihifting her Pofition as (he turns round 
the E^rth once a day, this Oval of Water fliifts with 
her, occafioriing thereby the two Floods and Ebbs obfer*. 
vable in each 1 5 Hours. 
And this may fuffice as to the general Caufe of tha 
Tides ; it remains now to fhew how naturally this Mo? 
tipn accounts for all the Particulars that has beenobferv- 
ed about them ; fo that there can be no room left to 
doubt, but that this is the true caufe thereof. 
The Spring Tides upon the new and full Moons, and 
Neap Tides on the Quarters, are occafioned by the at° 
tradive Force of the Sun in the New and Full, confpi? 
ring with the Attraction of the Mopn, and producing 
a Tide by their united Forces : Whereas in the Quar- 
ters, the Sun raifes the Water where the Moon depref- 
fesir, and the contrary; fo as the Tides are made oa- 
iy by the difference of theirAttrataions.That the force of 
the Sun is no greater in this cafejproceeds from the very 
fmall Proportion the Semidiameter of the Earth bears to 
the vaftdiftance of the Sun* 
It 
