[914] : 
port. This fpirit of Nitre,atid calcin d coral will doe, if 
they are infpiffated, or brought to be dry. Iftwere ne- 
ceflary, I could inftance in that burning mixture ex Oleo 
Vitriolijpiritu urin(e^ ^ Jove : in all thefe we have a Call- 
dum difrigidum,^h.ic\\ is brought into motion by warmth, 
andmay give you heat, Thunder, and Lightning as you 
pleafe to manage it. Salt ot Tartar,Sulphur, and Nitre, 
make a fulminating powder, he will err here, that will af- 
cribe the efFed to Sulphur, as if it produced it, by vertue 
of its oyl, it is very plain, that it proceeds from the two 
contrary lalts. The Jcidum alone produces heat, but no 
AamQ,nnlQfs t\iQ fri^idum be added. Juft as a red hot Iron, 
may burn,or fcorch a thing, that it cannot bring to flame, 
V unlefs the fri^idum ftiould meet it. Oyl of Vitriol burns 
wood, which it could not do , unlefs it met its contrary 
there.I will pafs by the terrible heat, excited in the lolu- 
t\onoi Jupiter ^ Mars, altho* many fuch might be ap- 
; pealed to, which are well known to the experienced. I fhall 
only mention the wood coaU take it & let it be throughly 
kindled, and then go outof itfelf: kindle it throughly 
oncemore, and let it quench, or goout ina cruciblcor 
fome place where the cold Air, may not too much annoy 
it: this may be done ten,or twenty times fucceffively, and 
it will continue to give heat, and light: if this came from 
oyl,fure it mufl: needs bea veryfixt oyl, and tis impoffible it 
fliou^d perform fuch a work: but a Sal dtiphcattim, which 
by vertue of its terreftreity, is call'd an Alkali, is to be 
found here. 
But leaft I detain you too long,I fhall conclude with my 
defires, you will not ill refent this my Addrefs, but at your 
leafure hours , fet down your determination in a Page, 
whether I have treated things contrary to truth and ex- 
perience, whatever it be, I ftall willingly embrace it, and 
ie glad to be better informed, &c. 
FINIS. 
Printed at the Theatre in Oxford, for Hen. Clements 
Book^feller in Oxford. 
