(884) 
Author of Nature in fmallraymeots of Matter, which Princi- 
ples are to him the Mechanical Agents included in all thofe 
bodies commonly called ^S^^^i/; not but that thefe Principles 
themfelves are alfo material, and, in his opinion, ultimately re- 
ducible into Water (which he would have the Material Princi- 
ple oF all Concretes, ) but with this difference, that they are 
pure and very fubtile parts (engaged in groffer (^nes) adapted 
for ihat modon; which he fuppofes abfolutely nectffary in 
the fabrick of all Mixts. By Ferments be means the af, refaid 
Principles, (or Seminal Tparks hidden in matter) aflually put 
into motion , and by the variety of that motion producing the 
variety of bodies. 
This fignification 6f his Setftinal and Fermental principles 
he illuftrates by the Generation both oi Vegetables and Animals*^ 
efteeming the faid generation to be no other than a natural E- 
volution or Expanfion of the implanted Seminal principles 
contained in the minute Seed or E;»^^r/(?, and rendred fruitful 
or prolific by the odour of a fpirituous ferment. So that thefe 
Seminal Principles, carried on by a mutual collifion of Mecha- 
nical AgentSjare, to him, the very groundwork of all natural 
Fire in bodies, and that thefe little Fires, harboured in fo ma- 
ny minu:e portions of Matter as there are variety of things^ 
give motion and vigour to everybody wherewith they are 
cloathed. Moreover, the Author confidering Bodies in their 
Generation, and Mutation, and reducing them to their feveral 
ClaffeSyht finds, there are feven Complications, or feven ways of 
Aggrefliohs of his Principles, Acids and Sulphurs; andcon- 
fequently fo many forts of Fires, hid in the bofom of things, 
according to thofe feven Modifications of the Principles , by 
which they varioufly combine to the raifing of bodies, and to 
the d iflTol ving of them again. 
And thefe feven Compiications he thus reckons up : The firjl 
is, when the Principles combine in fuch a peculiar ColhfioDj 
as that the Ether ed matter is interwoven therewith, and is fo- 
mented by a continual fupplyfrom the perpetual circulation 
of that^ther; of which fort he makes the Solar Fires to be, 
becaufe made from the fame principles that the Solar rays are ; 
fuch as Lighr and Heat in the Macrocofm, 
The/^^-^jWis, when theaforefaid Principles do accoft each 
other by di gentle collifion , either progreffive from the Center , 
as 
