fulphurcbus and aereal particles, with which 
common dung, lime, aflies, fword, or burn- 
bated turf abound : As alfo fuch manures 
as have nitrous and other falts iii them ; for 
tho’ neither nitre nor common fait be found 
in vegetables 5 yet fincc they are obferved 
to promote fertility, it is realbnable to con- 
clude, that their texture is greatly altered 
in vegetation, by having their acid volatile 
falts feparated from the attrafting central 
air and earthy particles, and thereby mak- 
ing new combinations with the nutritive 
juice 5 and the probability of this is further 
confirmed from the great plenty of air and 
volatile fait, which is found in another com- 
bination of them, in the Tartar of fer- 
menting liquors : For it is the opinion of 
Chymifts, that there is but one volatile fait 
in nature, out of which all other kinds of 
falts are formed by very different combi- 
nations, all which nutritive principles do 
by various combinations with the cultivated 
earth, compofe that nutritive duftile mat- 
ter, out of which the parts of vegetables 
are formed, and without which the watry 
vehicle alone cannot render a barren foil 
fruitful. 
I 
Nor 
