MINERALOGY. 
211 
with it likewife, if the regulus of anti- 
mony be previoufly melted with an addi- 
tion of limco 
SECT. CCXXXIIL 
Antimony is found in the earth. 
Native, Antimonium natrvum^ Jtve, Regulus 
Antimomi nations. 
This is of a filver colour, and its texture 
is Gompofed of pretty large Ihining planes. 
This kind was found in Carls Ort, in the 
mine of Salberg, about the end of the laft 
century ; and fpecimens thereof have been 
preferved in colledions under the name of an 
arfenicai pyrites, until the mine-mafter Mr. 
Von Swab difcovered its real nature, in a 
treatife he communicated to the Royal Aca- 
demy of Sciences at Stockholm, in the year 
1748. Among other remarkable obferva- 
tions in this treatife, it is faid, firft, That 
this native antimony eafily amalgamated with 
quickfilver; doubtlefs, becaufe it was im- 
bedded in a limeCtone*, fince, according to 
Mr. Pott’s experiments, an artificial regulus 
of antimony may, by means of lime, be dif- 
pofed to an amalgamation: Secondly, That 
when brought in form of a calx, it Ihot into 
criilals during the cooling 
* Since native antimony, or, as it is commonly called, re- 
gulus of antimony, was never before defcribed, the pollibility 
of its exigence has been denied ; and when this here men- 
tioned was difcovered, fomebody publilhed fome doubts of 
the truth of the whole affair, upon no better foundation than, 
that the fpecimens were very fmall for making experiments, 
and that it was uncertain if ev r mineralUtd antimony had 
been found in the mine of Salberg : but thofe reafons are not 
fufhcient to refute experiments, becaufe men of expeiience 
are 
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