Part I. in it/je Cke ATio"^. 53 



(tlW not an homogeneous Liquor, yet) a fluid 

 Subflance, the only material Agent, or Mover, 

 is a moderate Heat. Now how this, by pro- 

 ducing an inteftine Motion in the Particles of the 

 Matter, which can be conceiv'd to differ in no- 

 thing elfe but Figure, Magnitude, and Gravity, 

 fhould, by Vertue thereof, not only feparate 

 the Heterogeneous Parts, but affemble the Ho- 

 iiK)geneous into Mafles, or Syftems, and that 

 not each Kind into one Mafs, but into many 

 and disjoined Ones, as it were fo many Troops 5 

 and that in each Troop the particular Par- 

 ticles fhould take their Places, and caft them- 

 felves into fuch a Figure ; as for Example, the 

 Bones, being about 300, are form'd of various 

 Sizes and Shapes, fo fituate and conneded, as to 

 be fubfervient to many hundred Intentions and 

 Ufes, and many of them confpire to one and the 

 fame Adiion, and all this contrarily to the Lawg 

 of Specifick Gravity, in whatever Pofture the 

 Body be formed ; for the Bones, whofe compo- 

 nent Parts are the heavier, will be above fome 

 Part's of the Flefh which are the lighter ; how 

 much more then, feeing it is form'd with the 

 Head, (which for its Bignefs is the heavieft of 

 all the Parts) upperm.oft. This, I fay, I cannot 

 by any Means conceive. I might inftance in 

 all the Homogeneous Parts of the Body, either 

 Sites and Figures, and ask by what imaginable 

 Laws of ^Motion their Bulk, Figure, Situation, 

 and Connedion can be made out ? What Ac- 

 count can be given of the Valves, of the Veins 

 and Arteries of the Heart, and of the Veins 



E 3 ^ elfe- 



