352 
COMPOSITION OF IPECACUANHA ROOT. 
should be so arranged that two of the opposite planes may be 
placed horizontally, and that it is found expedient, for the purpose 
of perfecting the termini of the larger prisms, that they should be 
suspended vertically. 
Several crystals were exhibited by Mr. Copney, which he had 
grown in the manner described in his paper. Among them were 
some perfect octahedra of chrome alum and common alum, of great 
size and beauty. The octahedron of chrome alum weighed 7j 
ounces, and the edges of the crystal were 2| inches in length. 
The octahedron of common alum weighed 6| ounces, and the 
edges were 2| inches in length. There was also a beautiful crystal, 
the nucleus of which was of common white alum, over which were 
depositions of a mixture of common alum and chrome alum, in 
such proportions as to give the crystal a beautiful- pink, or slight- 
ly amethystine color. Sitll larger than these, however, was one 
of chrome alum, containing a little common alum, the. weight of 
which was nine ounces, and the length of the edges 2§ inches. 
Besides, these crystals, there were some of unusually large size, 
of sulphate of magnesia, and of citric acid. 
The whole of these crystals excited much admiration, and the 
author of the paper, a late pupil in the Society's school, was com- 
plimented for the skill he had manifested in producing such beau- 
tiful preparations from the small quantities of ingredients he had 
to operate upon. It was mentioned that the crystals of citric acid, 
which weighed nearly an ounce, were obtained from a pint and a 
half of lemon juice* — Transactions Pharm. Society, May 1851. 
COMPOSITION OF IPECACUANHA ROOT. 
By Ertfin Willick. 
The author has examined the root of Cephae'lis Ipecacuanha in 
Rochleder's laboratory at Prague, and found small quantities of 
fat, traces of a volatile oil, gam, starch, pectin, emetin, woody 
fibre, and also a peculiar acid, erroneously considered by Pelle- 
tier as gallic acid The following are the results of this exami- 
tion : — 
