STUDY X. 71 



with a part of the temperate Zone?, whereas the 

 reft of it's circumference would be burnt up by 

 the too confiant fires of the Tropics. 



But if we fuppofe, together with thofe confiant 

 Laws of attraction and projection, a third variable 

 Law, which gives to the Earth the movement 

 that produces the feafons, and a fourth, which 

 gives it the diurnal motion of rotation round it- 

 felf ; and that no one of thefe Laws, fo oppofite, 

 fliould ever furpafs the others, and, at laft, deter- 

 mine it to obey but one fingle impulsion ; it would 

 be impoffible to affirm, that they had determined 

 the forms and movements of the bodies which are 

 on it's furface. Firft, the force of projection, | or 

 centrifugal, would not have left upon it any one 

 detached body. On the other hand, the force of 

 attraction, or gravity, would not have permitted 

 the mountains to rife, and (till lefs the metals, 

 which are the heavieft part of them, to be placed 

 at their fummits, where they are ufualJy found. 



If we fuppofe that thofe Laws are the ultimatum 

 of chance, and that they are fo combined, as to 

 form, among themfelves, but one fingle Law ; for 

 the fame reafon that they make the Earth move 

 round the Sun, and the Moon round the Earth, 

 they ought to act in the fame manner on the par- 

 ticular bodies which are at the furface of the 



f 4 Globe. 



