[ 8 47 ] 
Indeed regulus of antimony itfelf cannot be pre- 
pared but by deftroying the external fulphur : for 
inftance, eight parts of crude antimony, fix parts of 
crude tartar, and three parts of pure nitre, made in- 
to a dry fine powder, muft be thrown, by fmall 
fpoonfuls at a time, into a red-hot crucible, whence 
a very great deflagration immediately fucceeds each 
projection. At the bottom of the mafs, fil'd duly 
melted by a quick flrong fire, the regulus is found 
fometimes more, fometimes lefs, as the fire, &c. are 
managed. ’Tis a neceflary caution to force down 
the crufls, that are apt to form, at the beginning of 
the fufion, with an iron rod, or the like. Here a 
great part of the external antimonial fulphur is con- 
fumed by the deflagration, and the tartar and nitre 
being alfo forthwith alkalized by the fire, unite with 
the remaining fulphur, and fo form a kind of hepar 
fulphuris, which diffolves, and takes up likewife, 
much of the reguline fubftance ; (for liver of ful- 
phur, melted with any kind of metal, diffolves it, 
and even makes a mafs foluble in water) ; fo that by 
this procefs much the greater part of the antimony 
and falts is turned into a fcoria, or a kind of crocus 
antimonii, on the top of the regulus ; and this efpe- 
cially if the fufion is long continued. The regulus, 
thus detached in a great meafure from the fulphu- 
reous part, becomes very firongly emetic, for the 
real'on above afligned. Though this is a common 
method of making regulus of antimony, at leafl in 
fmall quantities; yet it is far from giving fo large a 
portion of regulus, as may be had by feveral other 
procefl'es; for it confumes not only much of the ful- 
phureous, but alfo of the reguline part, by the vio- 
