(seq. 449)

442

Materia Medica

Sialagogues

but in summer this would melt and disengage a part of the
mercury. Mr Delany proposed to rub the quicksilver and afterwards the
hogs lard, generally Ʒi or Ʒifs [1 or 1½ dram] rubbed on the skin produces salivation
in 24 Hours, but in some persons it operates sooner, it has been said
that this medicine acts as well if it merely be spread on the surface
of the skin, it is my opinion however that it must be carefully
rubbed untill it disappears, the preparations of mercury which are
formed by calcination were formerly esteemed by Dr Cullen. I
have now to speak of the calcination saline preparations of
mercury or its union with acid and first with the sulfuric acid.

Turbith Mineral. This must be given in small
doses of from one, two, three, or four grains, when it is well prepared
four grains is said to excite vomiting, formerly it was given to excite
nausea it was also combined with guacum for the purpose of
determining to the skin. I have already mentioned that I have employ’d
this medicine in Epilepsy, and Gutta Serena and shall say more of
it when treating of emetics. A child of five years of age will be puked
immediately by two grains.

Corosive Sublimate.
Is formed by Muriatic Acid and Quicksilver, this is one of the most
important preparations, though Dr Cullen and some others do