[ 8 6l ] 
emetic power of the antimony, appears in part from 1 
what I have faid above, and will be more manifefl 
by attending to the following experiments. If merely 
equal quantities of antimony and nitre are deflagrat- 
ed, and melted together, only fo much of the exter- 
nal inveloping fulphur is confumed, as to leave the 
reguline fpicula naked, and capable of very ftrongly 
irritating the coats of the ftomach, &c. But if three 
parts of nitre are taken to one of antimony, by the 
repeated ftrong deflagration, not only the external 
but the internal fulphur alfo is totally diffipated, and 
the mafs reduced to an inert calx. Thus likewife 
iron, tin, and copper, with a double or treble quan- 
tity of nitre, are reduced to allies, and demetallized.. 
A little more than two parts of pure nitre to one of 
regulus antimonii reduces it to an innoxious calx, as 
there is much lefs fulphur to be burnt off in the re- 
gulus than in the crude antimony : and about am 
equal quantity of falt-petre quite deftroys the viru- 
lence of glafs of antimony, as in it there remained 
only juft fulphur enough to preferve the reguline na- 
ture. So five parts of nitre to two of mercurius vitas- 
convert it into an afliiw-fubftance, or kind of bezoar 
mineral. But of this enough — What nitre doth by- 
deflagration, the burning- glafs doth by the intenfe 
force of the concentrated fun-beams ; by which an- 
timony, its regulus, and glafs, are turned to a mere 
calx, the whole of the fulphur being quite burnt 
up. Nay, when any of thele are a long time expofed*. 
to the adion even of a common flrong fire, they are. 
reduced to mere allies, which can neither be run in- 
to regulus or glafs again, but by the help of fome; 
phlogifton, as animal, vegetable,. or mineral, fulphur. 
And: 
l/ULt fUSt' 
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