CONTENTS. 
V 
No. III. 
I 
On Precipitated Carbonate of Lime. By Robert Bridges, M. D., 161 
Report on Catecbu, 164 
On the Preparation of Perchloride of Iron, - - - - 167 
On the Chloride of Gold, 173 
On the Preparation of Pharmaceutical Extracts. By M. Burin, 174 
On the Impurity of some Drugs. By David Murdoch, Esq., - 182 
Description of the Frankincense-Tree, as found near Cape Gar- 
dufoi, on the Somauli Coast. By Captain G. B. Kemp- 
thorne, 187 
On the Preparation of the Hyposulphite and of the Trithionate of 
Potash. By M. Plessy, 190 
Investigations concerning Creosote. By M. H. Deville, - - 195 
Memoir on Alterations Experienced by some Organic Alkalis, in 
contact with, and under the Influence of, Oxygen in the 
Nascent State. By M. Eugene Marchand, - 197 
On the Means of Ascertaining the Adulteration of Potassa by Soda, 
and determining, in a simple manner, the proportion of the 
latter. By E. F. Anthon, of Weisgrun, - - - 203 
Memoir on Alcoholic Ferments. By M. Bouchardat, - - 223 
On Sagapenum and Elemi. By A. J. Cooley, ... 330 
Miscellany, 233 
