10 
ON AR1STOLOCHIA RETICULATA. 
Take of mercury, - giij. 
resin, - - - - 3vj. 
prepared chalk, - - §v. 
alcohol, - - - q. s. 
Make a paste of the resin with a small quantity of the 
alcohol, then add the mercury, which may be extinguished 
in a very short time ; add the chalk and alcohol gradually 
so as to keep up the pasty consistence, until done ; then add 
sufficient alcohol to dissolve the resin, and wash the powder 
on a filter. 
ART. IV. — ON ARISTOLOCHIA RETICULATA. 
By Thomas S. Wiegand. 
A Thesis, 
The plant which forms the subject of this essay having 
lately been introduced into the market to a large amount, it 
was thought that an examination of it in comparison with 
the officinal article would be interesting. 
Aristolochia : Sexual System, Gynandria hexandria. 
Natural Order, Jiristolochiacex. 
Generic Character. — Calyx none. Corolla one petalled, 
ligulate, ventricose at base. Capsule six-celled, inferior. 
Willdenow. 
There are many varieties of Aristolochia, as many as ten 
or twelve being enumerated by Dr. Wood, in the United 
States Dispensatory. Of all these but one has been adopted 
by the Pharmacopoeia, and thus rendered officinal. This 
is the Aristolochia serpentaria ; although there are four 
