70 
PHARMACEUTICAL MEETINGS. 
members to the subject, with a view of eliciting correct di- 
rections for its preparation. 
Dr. Bridges called the attention of the meeting to the 
apparatus of Dr. J. K. Mitchell, of this city, for obtaining 
carbonic acid in a liquid state. After some observations rela- 
tive to the mode of using the instrument, Dr. Bridges ob- 
served that he had previously prepared a quantity of the 
liquid carbonic acid, for the purpose of exhibiting the pro- 
cess of obtaining it in a solid form by means of an additional 
instrument. The members were gratified by inspecting 
the solid acid, together with a quantity of mercury which 
had been solidified by a mixture of the acid and ether. 
February 6th, 1843. 
Professor Bridges in the chair. 
The journal of the last meeting was read and adopted. 
The Journal de Chimie Medicale for December and No- 
vember, 1S42, the Pharmaceutical Journal for October and 
November, 1842, and the American Journal of Pharmacy 
for January, 1S43, were presented to the meeting. 
William Procter, Jr., in accordance with the request of 
Dr. Carson at the last meeting, offered the following formula 
for Syrup of Pipsissewa, viz.: 
Pipsissewa, four ounces. 
Sugar, twelve ounces. 
Water, a sufficient quantity. 
Macerate the Pipsissewa, finely bruised, in eight fluid 
ounces of water for thirty-six hours, and then subject it to 
displacement, until one pint of fluid is obtained. Reduce 
this by evaporation, to eight fluid ounces, add the sugar, and 
form the syrup in the usual manner. 
The coriaceous character of the leaves requires that they 
should macerate for a length of time, to be completely per- 
meated by the menstruum. 
One fluid ounce of this preparation contains the strength 
of two drams of Pipsissewa. 
