Lea. L The Nature of Mixture. 227 
for this, or any one Le&ure, I (hall, before I come to the Canfes of 
Mixture, only deduce from the Premifes ; thefe following Corollaries. 
12. 9. Firf, That there is no alteration of Principles or of Ele- 
ments,in the molt perfet Mixture of Bodies. It cannot be ; for Principles 
are Immutable, as we have faid. And ifit could be, yet it meedeth mot Ch, 2, $. 3: 
to be: forthey are alfo many, and, componndable infinite ways 5 as 
hath been fhewed. So that we have no need to perplex our felves Gh. 2. 5.5: 
with any of thofe difficulties, that arife from the Doéfrine of the Ch.3. 5.10: 
Alteration of Elements. The ground of which conceit, is that, of 
three being but four Elements, and all in every. particle of the 
mixed Body. And fo men being puzeled, how from thence to make 
out the infinite variety of Bodies, they feigned them to be alterable, 
and altered, upon every perfect Mixture. Not confidering, that if 
their four Elements be alterable 3 as few as they are, no fewer then 
three of them may be fpared : for one Element,if alterable, may belmade 
any. 
Yen $, Hence, Secondly, may be folved that great Di/pute, Whe- 
ther fuch as we call Lixivial Salts, are made by the fire? For firft, 
re. Wi No Principle is made by the fire: all Principles being unalterable 5 
and therefore unmakable.. secondly, We mutt therefore diftinguifh 
betwixt the Principle, and its various Mixture with. other Principles 5 
from whence it may receive different Shapes and Names. Wherefore, 
a Lixivial Salt, qua Lixivial, is certainly made by the fire. But qua- 
tenus Salt, it is not: that Principle being extractable out of moft Bo- 
dies; and by divers other ways, then by the fre, For whether you 
Calcize a body, or elfe Ferment it, (after the manner (hewed by the 
curious Improver of Chimical Knowledg, Dr. Daniel Cox ) or putrifie 
ic under ground, or drown it in the Sea 5 it (till yieldeth fome kind 
of Salt. All which Salts are made, not, by making the Saline Princi- 
- ple but only by its being differently Mixed, by thofe feveral ways 
ofthe Solution of Bodies) with other Principles: from which its dif 
ferent Mixture, it receives the various Denominations, of Marine, Ni- 
trons, Volatile, or Lixivial. 
14. $. Hence, Thirdly, the moft perfect Mixture of Bodies, can 
go no higher than Coxtaé?, |For all: Principles are unalterable 5 and all Ch.2. $. 3. 
latter is impenetrable 5. as hath been faid. . In the mot vifíble and laxe Ch.3. 9. 
Mixture, there is Contac 5, and inthe moft fabtile and perfec, as in Ge- 
neration it (elf, there is nothing more. 
15. $. Hence, Fourthly, we: eafily.underftand, how divers of the 
fame Principles, belonging both to Vegetables and many other Bodies, 
are alfo aéfually exiftent in the Body of Mam. Becaufe even in Gene- 
ration or Tranfmutation, the Principles which are tranflated from one 
Body to another, as from a Vegetable to an Animal, are not in the lea(t 
alter'din themfelves; but only their Mixture, that is, their Conjigation; 
Proportion and Location, is varied. 
16. §. Hence alfo the difference of Mixture; arifing from the dif- 
ference of Contal?, is intelligible; fr. as to thofe three degrees, Congres 
gation, Union, and Concentration. 
Congregation, and Inconfiftent Mixture, is when the feveral Atomes r 
touch but in a Point, or Jmaller part. In which manner, I have divers Ch:3. $. 8. 
arguments, inducing meto believe the Atomes of all Fluid Bodies, qua 
‘Fluid, dó touch 5 and iñ ro other. 
Ch.2. $. 3: 
Maz Dell 
