c 850 ] 
and intimately combines with, the reguline part, juft 
as common hepar fulphuris diffolves and takes up 
all kinds of metals. That this chiefly depends on 
the alcalization of the nitre, and its confequent union 
with the antimonial fulphur, and thus forming a 
diffolving liver of fulphur, that combines with the 
metallic part of the antimony, is evident ; for three 
parts of fait of tartar, or pot-afh, fluxed with two 
parts of antimony, produce exactly the fame effed, 
that is a liver of antimony, without the leaft admix- 
ture or help of any nitre. And it is from the inti- 
mate union of fo large a portion of this hepar ful- 
phuris with the metallic part, that little or no regu- 
lus is depofited, but only an uniform half-vitrified 
fubftance at the bottom : nay, if it be not diffidently 
fluxed, it gives off no fcoria. However, if the pot- 
afh and antimony are quickly melted with a very 
brilk ftrong fire, a bit of regulus, fometimes more, 
fometimes lefs, is found at the bottom. But if a 
much lefs quantity of the alcalious fait is ufed, much 
lefs of the antimonial fulphur is taken up, and it fo 
forms what is called by Margraaf, Hoffman, and 
others, regulus medicinalis, that exerts but little 
emetic power, there being fulphur enough left to 
invelope the reguline fpicula. But when a much 
larger quantity of fixed alcali falts (as about two 
parts to one of antimony), is blended with it by 
fufion, fo much of the fulphur is taken up by the 
fait, that little is left to fheath the reguline parts fuf- 
ficiently to prevent their exerting a very draftic 
power. The liver of antimony, made in the ufual 
way, with equal quantities of nitre, loofes almoft 
twice as much, i&the operation, by the deflagration, 
as 
