(* 7 °) 
in this it comes ftiort ; that as it gives an Account of two Tides; 
fo thole two Tides are alwayes to be at F and D / that is,at Noon 
and Midnight wherea* Experience tells us 3 that the Time of 
Tides, moves in a moneths {pace through all the 24. hours. Of 
which he gives ns no account. For though he do take notice 
of a Menftrual Period $ yet he doth it onely as to the Quantity 
of the Tides greater or lefs : not as to the Time of the Ttdes } 
fooner or later. 
* Fid, Riccioli Alma - 
geft. novum, Tom. r. 
lib. 4. cap. 10. n. ill. 
pag. 216. 2. 
To help this, there is one ( VU, * Jo, 
Baptifia Balianus)vt ho makes th z Earth to 
be but a [econdary Planet; and to move, 
not directly about the Snn,but about the 
Moon 3 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 furnifh us with the foundation of 
a Menjlrual Period of Accelerations and Retardations in the 
compound motion of feveral parts of the Earths furface ; yet 
I am not at all inclined to admit this as a true Hypothecs, for di« 
vers Reafons , which if not demonftrative , are yet fo confo- 
nant to the general Syfteme.ofthe World, as that we have no 
good ground to disbelieve them . For 1. 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 
fhould be carried about by the Moon, lefTer than it felf : The 
contrary being feen. not onely in the Sun 3 which is bigger 
than any of the Planets, which itcarryes about* but in Jupiter 3 
bigger than any of his Satellites s and Saturne, 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 caufe of the Primary Planets 
moving about it ; So there is the like reafon to believe, that 
Jupiter and Saturne moving about their Axes, are the Phyfical 
eaufe of their Satellites moving about them , which motion of 
Jupiter hath been of late difeover’d, by the help of z fixed Spot 
difeern’d in him ; and we have reafon to believe the like of Sa- 
turne. Whether Venus and Mercury (about whom no Satellites 
have been yet obferved ) be likewife fo moved s we have not 
yet the like ground to determine ; But we have of Mars 5 from 
