vi 
CONTENTS. 
No. IV. 
On Kalmia Latifolia. By R. H. Stabler, M. D., 241 
On the Source, Physical and Chemical Properties, of a Species 
of Human Gall Stone. By E. Neal, M. D., - - -247 
Extract of Senega and Squill. By John H. Ecky, - 249 
Preparation of Narcotic Extracts. By Scheidemandel, - - 250 
On the Deoxidation of Ferridcyanide of Potassium, and of Salts 
of the Peroxide of Iron. By Professor Schonbein, - 252 
On the Febrifuge Properties of Variolaria Amara. By Dr. Dassier, 262 
On the Distribution of Mineral Substances in Individual Organs 
of Plants. By Dr. A. Vogel, Jun., - - - - 264 
Action of some of the Alkaline Salts upon the Sulphate of Lead. 
By J. Lawrence Smith, 268 
On the Different Kinds of Calcined Magnesia Employed in Medi- 
cine. By M. Mialhe, 272 
On the Alterations and Adulterations of Alimentary Substances. 
By A. Chevallier, - 281 
Purification of Gum Resins by Means of Distilled Water and 
Essential Oil of Turpentine. By M. Lamothe, - - 297 
On the Preparation of the Valerianate of Zinc, and its Medicinal 
Employment, 298 
On a New Method of Preparing Iodide of Potassium. By R. 
Phillips, Jun., - 301 
On the Presence of Lead in the State of Oxide or Salt in Various 
Artificial Products. By M. Chevreul, - - - - 303 
Minutes of the Pharmaceutical Meetings, - 309 
Miscellany, 315 
