254 PROCEEDINGS OF THE N. Y. COLLEGE OF PHARMACY. 
down in the air. The effervescence continued after the 
fumes had disappeared. 
The solution treated with starch and sulphuric acid, pre- 
sented a reddish orange colour. 
From these experiments, each of which was tried in 
comparison with a portion of Iodide of Potassium of known 
purity, the suspected article was judged to be Bromide of 
Potassium, and to decide this, Mr. Reid proposed to examine 
it quantitatively by means of sulphuric acid. As this pro- 
ceeding required considerable time, the matter was left in 
his hands. He informs the committee that the substance 
was treated with sulphuric acid, and converted into super- 
sulphate of Potassa. The excess of acid was neutralized 
with bi-carbonate of Potassa, the amount of which was 
carefully noted, and the sulphate it would form deducted 
from the whole, the remaining sulphate indicated the equi- 
valent of sulphate of Potassa that Bromide of Potassium 
would give. The conclusion is, therefore, that the substance 
examined is Bromide of Potassium. 
Respectfully submitted, 
C George D. Coggeshall 
Signed. 
Committee. 
New York, November 1 9th, 1S46. 
