f 73 ) 
with which it is affociatcd : It remains, that I flhould declare 
the Nature of the Salt in Erimjlo/je, znd whence it is derived. 
, Brimftone confifts of Miner d Sulphur, and an Acici Salt, 
which being united, it is no difficult matter to conceive>how 
it fhould become VolatiI,if we vcR^di on Cwmter diud Subli- 
mate. In f?;^^, Mercury is fo difguifed by a little fulphur , that 
it feems a Mineral fubftance of another nature,and, abatifig the 
colour,not unlike Antimony ; In the other^SdXts very acid and 
fixt are rendredfufficienily volatil. Now, whence the Brim- 
ftone fliould derive its Sulphureous particles,will appear very 
obvious to them,who have obferved, how much the bowels of 
the Earth abound with bituminous fubftances. What elfe 
feeds all the fubterraneous fires f What an immenfe quantity 
thereofis lodged in the Earth, will be attefted by our large 
and numerous Coal-mines, and by thofe Eruptions of bituaii« 
nous fubftances in many quarters of the world, among which 
that,canedi\Z^pfo^^,is fo purely fu!phureous,fo free from mix- 
ture with any other materials,thac upon the very approach of 
fire or flame it is immediately inflamed, and fcarcely to be ex* 
tinguiflitj until wholy confumed. As for the Saline principle of 
Sulphur,! conclude it to be C^)«^;^i?;^5'4://,which,together with 
the Aerial Salt before mentioned, is the foundation of all Sa- 
line fubftances in the ttniverfe* How it comes to be fo much 
diverfified by ftrong and violent hear, or long and eafie dige- 
ftions,as alfo by its ading<?;^,and combinations ia?/>^,particles 
ofdifferent nature ^ Ifliallat your next fummons endeavour 
to make manifeft,ic not being an ungrounded fancy ^buc a per- 
fuafion derived from many Experiments and long Obfervatlon» 
Illiallat prefentonly afTure you, in reference to the prefect 
difcourfe, that I can with Common Salt make both Vitriol md 
AUum^ hardly diftinguifliable from the Natural. 
L 
A# 
