PHARMACEUTICAL MEETINGS. 
71 
Dr. Carson exhibited a colored drawing of the Balsamo- 
dendron myrrha, copied from the work of Nees Von, 
Esenbeck. 
Henry W. Worthington called the attention of the meet- 
ing to a specimen of " pills of protoiodide of iron," and the 
formula for their preparation. This formula is composed 
after that of Dupasquier, but the pills contain a greater per- 
centage of the ferruginous iodide, and is as follows, viz.: 
Take of Iodine, 3ij. 
Iron filings, 3ij. 
Water, §ij. 
Honey, §ss. 
Tragacanth, 3iss. 
Add the iodine and iron filings to one fluid ounce of the 
water, and let it stand, with occasional agitation, until the 
fluid has acquired a slightly greenish color, then filter, and 
add the honey, and subsequently the Tragacanth formed 
into a paste, with the remaining water. Mix them inti- 
mately together, evaporafe to a pilular consistence, and di- 
vide the mass into one hundred and twenty pills. These 
pills, when well prepared, should at first be nearly colorless 
and translucent. Each pill contains one grain of iodine 
united to its equivalent of iron. 
Ambrose Smith exhibited a specimen of crystals obtained 
from rectified oil of turpentine, in which they had probably 
been formed by the absorption of oxygen. They melted, and 
wholly sublimed without change, when subjected to heat. 
He further directed the attention of the members to an im- 
proved DanielFs Battery. 
Dr. Bridges observed, that in connection with the sub- 
ject of Mr. Worthington's remarks he would state, as the 
result of some experiments, that the officinal solution of 
iodide of iron, which so frequently becomes dark colored, 
owes that color in great measure to some change which the 
coloring matter of the honey undergoes. He found that by 
