< 585 ) ■ 
Of ver, 
I (hail add here fome Experiments that I hai*p 
.upon Quickfilver^ tho> I ^anc yet draw ny poS 
pnclufions from them, not having profecuted them fo 
Ifar as is neceflary for that purpofe. 
I placed Quickfilver in the Focus of the Burnino- 
lupon Charcoal, upon the Coppel, and upon the Stonl^- 
ilt^^ll .mmedtately difperfed, and exhaled in a very thick 
I expofed upon the Stone to the Focus fomf- M 
ipncipitateperfi i„ ^ degree of heat equal to that ofdTJe 
fftion: It feem d to melt, but prefently difpeifed inVanoIr! • 
ranly there remained a fmall quantity of a very rarifcd’ 
IDuft, like a Froath or Scum; but continuing it in the 
Focus, It melted and gathered into a yellowilh Glafi 
I expofed fome Mercury Precipitate per fe uoon Cho. 
V and'^^asitWhedTn; Sx 
together upon the Coal, but they difperfed ag,? i!f 
tentJy in Vapours. ^ ^ 
Thefe Experiments feem to prove, that thevf^ ic • 
,‘iu!ckfilvcr a Sulphur that may be feperated by a verv 
t;entle hear, fuch as that of Digeftion^. ^ 
That as f&on as this Sulphur is taken away it Infes 
luidity and Brigfitnefs. ^ 
That the Bahs of Mercury is a Calx, or red Earth 
Thar this Calx does not melt into GUfs as the^aJx of 
tther Metals, becaufe it is too Volatile, and as (nan 
melts is evaporated by the heat, . 
M m m 
That 
