C ^08 ) 
Blood of Animals. That the Seed is the Syflem or 
Concentration of the whole Plant, and has Spirit or 
Ferment enough lodged in ir to afTimilate all that infipid' 
watry Element (which contributes Matter to its growth) 
into its own Nature ; from hence the great quantities 
of Eflential Oyls are produced. Its true, out of the 
* Trunks, and Roots, and Parts of Trees we have EfTen- 
tial Oyls extradkd, but with a vaft difparity, there be- 
ing only a very fmall quantity (in proportion to what 
is m the Seeds) floating up and down the other parts of 
the Vegetable. 
But lam not only to take notice of the Potential 
warmth of the Vegetable, there being in my Opinion 
another Ingredient fit to be obferved, which our EfTen- 
tial Oyls may be proved to contain, and that is a Vo^ 
latile Salt, which gives much of that pungency to the 
Taft. If we confider the Conftituent Parts of thefe 
Adive Vegetables, they much abound with Salts, which 
by a moderate Fire are made Volatile, and by a violent 
Fire are fixt. This feems to me more than probable by 
what I have found in a quantity of Oyl of Cinamon j 
having had it in my own keeping for Twenty Years 
for about Ten or Twelve Ytars it continued the fame, 
but within thefe fix later Years it has Annually let fall 
Ibme Salt, infomuch that it is now one half of it turned 
to Salt, and this without any addition or any Art ufed 
£0 reduce it to this form; 
There is alfo ieparated in Diftillation of great quan- 
tities of Vegetables, as^f Thyme, Organ, Penny- royal) 
&c. a Volatile Salt of a peculiar Nature (which our 
Excellent Chymift, Mr. Molt^diik (hewed me, and keeps - 
quantities of it by him ) this is very clear, or Cryftal- 
line, in its Specifick Gravity a fmall matter heavier than 
Water, and feems to be Salt and Oyl coagulated into a 
Body : It will not diffolve in Water, but eafily evapo- 
rates when heated. I now confider thefe Salts as Alkalies, 
which 
