C 47 ) 
Common Vitriol. The Spirit which remai0ed after the fepa- 
ration of the more volatil , was in all refpeOs like that of 
Lo^dm Viiriol ; only fEremed n^bre graieiUi acid, and might, 
like it, be feparated into Spinr,acd Oil, corruptly fo ftiled. 
Vitriol freed, as is before declared , from its Fauhy and 
Metallxk parts , by Z/V^, or other imperfecS Ivlmeia s , is 
much of the fame nacure, and yields its Sp ric in Sand , as this 
we have now mentioned : Is alfo White , and m^re undnous ; 
bath a grain more like Nitre than Vitriol ^ as hath alio the 
Gofiar Vitriol 3 which is White, and comparatively unc^'ionSj 
becaufe it hath little Mertal, and lefs Mineral-Sulphur than the 
Common ; whofe Metalline part detains the Salmc ^ and wil! 
not difmifs ic until Jong urged by a very inteofe deg ee of heat;. 
What remained in the Recorc, after this diftiliation , w^asnot 
red or purple, like the Caput mortuum of Commjo V trio!, 
but white/light, and fpongious, like burnr Allom, and a toge- 
ther as infipid ; although, after it was fome time expofed uruo 
the Air, it received many ftrange impreffions and alterations ; 
which, though very remarkable, I omit, as not anfweringmy 
prefentdefign, which is to enquire, whence the Sa ine prin- 
ciple in Vitriol proceeds 5 and how it comes to be f) com- 
pounded > But firft, I cannot but take notice of the great 
affinity that is betvveen Vitriol^ ,4'^om^> and Mineral Sulfhur \ 
the Saline Principle, which is in each of them by far the chiefs 
both in quantity and energy , having one natur e and the fame 
properties; although in the laftclog'd with a fiFalLpartloa 
of Sulphur. For notwithftanding what is commonly received, 
1 fliall clearly prove, that the body of Common Sulphur is a 
Vitriol ^alt, the very fame with that, which is fepa^'ablefrom 
Common Vitriol ; and that the Sulphureous parts are not only 
lefs copious , but inconfiderab e forbu k, compared with 
the Saline^ which are fincere Vicriot , not differing from the 
Common on'y hat doth not fo much abound in Metallick 
and Earthy part xies. 
So far the Author for thii time ^ having been umxpeBcdly in' 
tC f rupted t proceed in this defign^ which he hath pomijed 
tofinijhfifrthcnextopportmisy. 
Soms- 
