Chap. III. ANTIENT METAPHYSICS. 23 



is, as he exprefies it, in one place^ fuch is the motion of a circle round 

 the centre, or of a Hue, in the formation of a circle, round one point ; 

 by which, he obferves, a thing is produced, that he calls very wonder- 

 ful, namely, that the fame motion fliould have different degrees of 

 quicknels and flownefs, according as the feveral circles, produced by 

 that motion^ are greater or leiler, and in proportion to the difference of 

 the circles. T\\t next Vm^ o{ motion \h^ when the place is changed, 

 and the body moving is continually changing its centre. The third 

 he c^\hjeparatien ; \\\t fourth is compofttion ; the f/th is diminution ; 

 the /ixtb, augmentation ; the feventh is generation., by which body ac- 

 quires its three dimenfions, and becomes perceptible by Jenfe ; the 

 eight is corruption or de/iruclion ; the ninth is that motion ivhich can 

 monje other things, but cannot monje itfelf ; and the lajl is that ivhich 

 can, not only move other things, but itfelf, and ivhich produces all the 

 other motions aboue mentioned. 



Here it may be obferved, that the feveral members of this divifion 

 plainly comprehend one another ; fo that, properly fpeaking, it is no 

 divifion at all. For ih<t frji kind of motion which, he fays, is in one 

 place, is plainly comprehended under the jecond member of the divi- 

 fion, viz. motion which changes places : For it ia a fubdivifion of that 

 kind of motion, which is, either when the whole body changes its 

 place, that is what we call progre/Jive motion; or, when only the parts 

 change place, the whole body continuing to occupy the fame fpace. 

 In this way, he might have made a diitinClion o^ motion, by change of 

 place ; but, to divide motion, as if any of it could be without change 

 of place, taken in the large fenfe, was improper. The third and 

 fourth members are alfo the fatne with the ffth and fixth j for 

 diminution is nothing but feparation, and augmentation is nothing 

 but compcfition or accumulation. As to the Je'Uinith, viz. gcjie^ 

 ration, it is rejeded altogether by the Dodors of the Peripatetic 

 School ; becaufe a thing cannot be laid to be moved, or to be, 

 in any way, cither a^live or pajfvc, before it exilt ; they do not, 



there- 



