(270) 
in this it comes fiiort > that as it gives an Account of two Tides; 
c fo thofe two Tides are al wayes to be at F and D > that is^at Noon 
and Mzdmght'y whereas Experience tells us , tfeatthe Time of 
Tides, moves in a moneths /pace through all the 24, hours. Of 
which he gives us no account. For though he do take notice 
of a Menitrual Period % yet he doth it onely as to the ^antity 
of the Tides , greater or lefs > not as to the Time of the Tzdes^ 
fooner or later. 
* rr-j „. . ,. A, '^^ ^^'^^^ ^^^^^ C * % 
f td. R^ccioU A^mar p^^^^-^^ who makes ih^ Earth to 
lib. 4. cap. 10. n. III. be but a /^W^ry Planet; and to move, 
pag. 216 2. * ' not directly about the Stinjbut about the 
Moon 5 the Moon meanwhile moving 
about the Sun ; in like manner as we fuppofe the Earth to move 
about the Sun, and the Moon about it. 
But this, though it might furnifli us with the foundation of 
a Jlfenjlrual Period of Accelerations and Retardations in the 
compound motion of feveral parts of the Earths furfacc ; yet 
I am not at all inclined to admit this as a true Hypothefis, for di- 
vers Reafons , which if not demonftrative , are yet fo confo- 
nant to the general Syfteme of the World, as that we have no 
good ground to disbelieve them . For i. The Earth being 
undeniably the greater Body of the two ( whereof there is no 
doubt to be made ^ it cannot be thought probable, that this 
fliould be carried about by the Moon, lefler than it felf : The 
contrary being feeuj not -onely in the Sun^ which is bigger 
than any of the Planets, which it carryes about • but in Jupiter^ 
bigger than any of his Satellites ; and Satarne, bigger than his. 
2. As the Sun by it's motion about it's own Axis , is with good 
reafon judged to be the Phyfical czuk of the Primary Planets 
moving about it ; So there is the like reafon to believe, that 
Jupiter sind Saturm moving about their Axes, are thePhyfical 
caufe of their Satellites moving about them 5 which motion of 
Jupiter hath been of late difcover'd, by the help of a fixed Spot 
difcern'd in him ; and we have reafon to believe the like of Sa-^ 
turtle. Whether Ferns and Mereury ( about whom no Satellites 
have been yet obferved ) be likewife io moved i we have not 
yet the like ground to determine : But we have of Mars j from 
the 
