C ^07 ) 
"Water, and Earth, and Soot, and a true EiTential Oyl , 
which afterwards will bear repeated Diftiilatioos witfi- 
out any further difToJution, 
Having fet by thefe Vegetable , but not Eflentiat 
Oyls, we will briefly examine the Mineral Oyls , of 
which there are fome, as Oyl of Vitriol, Oyl of Sul- 
phur per Campanam^ that have not any Property of Oyls^ 
but are rather Acids, and Corroding Menftruums. There 
are others that have the true Property of Eilintial Oyls, 
as Oleum Petreoli^ zn^Barhadoes Tar highly reftified^ 
which do not produce any Remarkable Heat, much iefs 
make an Ebullition or Explofion : Nor does that aftive 
Oyl of timber do any thing more. 
The ftillatitious Oyl of Bees-wax had much the fame 
Effeft when it was incorporated with our Compound 
fiery Spirit : And this inclines me to believe that the 
Wax it fclf may be a Compound more belonging to a 
Mineral than Vegetable Nature. 
And now we will examine thofe Eflential Oyls,which 
do produce great Ebullition, Explofion, and Flame, with 
the Compound Spirit. Of thefe we have two forts , 
Vegetable and Animal. 
The true Vegetable Eflential Oyls do all of them 
make violent Ebullition and Expbfion, and feveral do 
actually take fire and Flame, as the Catalogue of Expe- 
riments do fpecifie. 
If it be enquired into, what fliare the Oyl has in 
producing this Fire, whether only it be a Falulum^ or 
Fewel, for the Spirit to aftuate, and fo be meerly Paf- 
five > Or whether it contributes any Particles that do 
help to excite this Flame > 
In order to refolving this Doubt, we confider, That 
theft Eflential Oyls are produced from Seeds that have 
very adive or warm Parts or Spirits, fuch as will eafily 
ferment and heat, and have a warming influence upon 
our Tongues, and do give heat to the Stomach and 
I i X Blood 
