Clo8) 
2. In the Second, he examines the CA/^^<^^/, which he knows in Mit- 
terrand makes it his bofinels to explicate all thofe that refpeA S^antity^ 
^alities and Forms , by Local Motion , cfteeming Jieir needs no 
other, 
5 . In the thirds he 'explains the Motion of Artificial Engins, and that 
0^ Natural ones, by one and the fame Caufe; endeavouring among 
other things to (hew, that the Body of an Animal is moved after the 
*fame manner with a Watch. That caufe of motion he makes the Mate- 
ria Snhtilisi and the finer or fubtiler that is, the better and fitter he 
conceives it to be to prefervc Motion. 
4. In the Fourth, he teaches, that thoagh Experience feems to evince^ 
that the Soul moves rhe Body, and that one Body moves an orhcr ; yet 
there is nothing, but God , that can produce any raotion in the World, 
and all other .Agents , which we believe to be the Caufe of this or 
&ac Motion , are no more but the Occafi&n thereof* In doing this, 
he advances certain Axioms , and Gonclufions, which are in (hort, 
a. ItheAxims : That nofitbftance has that of it felf , which it can 
ioofe, without eeafing to be , what it is: That every body may ioofc 
•of its motion , till it have no more left, without eeafing to be a Body t 
That we cannot conceive but two forts of fubftances, v/W. a Spirit ( or 
That which think^eth) and a Bedy , wherefore they muft be confidered 
as the Caufes of all, that happens , and what cannot proceed from the 
one , muQ: neceffarily be adfcribed to the 6ther ; That to Move , or to 
caufe motion, is an Aftion ; That an AAion cannot be continued but by 
the Agent, who began it. 
b The C one lu (tens ; That no Body haih Motion of it fclf : That 
the Firft Mover of Bodies is not a Body: That it cannot be but a «y/?*>iV, 
that is the Firfl: Mover ; That it cannot be but the fame Spirit, who has 
begun to mov^ Bodie5,that continues to move. 
In the Fifth , H^e treats of the Union of the Body and Soul , and the 
mr nner , how they aS one lipon the other ^ and efteeras it not more 
difficult to conceive the A^ion of Spirits upon Bodies , and of Bodies, 
upon Spirits , than to copceive the Adion of Bodies upon^odies : the 
caufe of the great difficulty in underftanding the two former , arifing 
faccording to him) from thence, that we will conceive the one by the 
other, not confidering , that every thing afting according to its own 
niture, we fliall never know the aftion of one Agent , if we will exa- 
mine it by the notions we have of another, that is of a quite differing 
nature. Here he notes , that the Aftion of Bodies upon Bodies is not 
more 
