CONTENTS. 
No. IV. 
On the Chloride of Zinc. By Edward Parrlsh, .... 241 
On a New Process fur the preparation of Valerianate of Zinc. Suggest- 
ed by M. Brun-Buisson, and perfected by M. J. Lefort of Gannat, 243 
Proceedings of the New York College of Pharmacy, . . . 245 
On an Improved Drug Mill. Invented by Beriah Swift, . . . 255 
On Sophistications of Sulphate of Quinine and Blue Mass. By Wm. 
Procter, Jr., . 257 
Experiments on Sarsaparilla. By W. S. W. Ruschenberger, . . 259 
A Manual of Materia Medica and Therapeutics, including the prepa- 
rations of the Pharmacopoeias of London, Edinburg, and Dublir , 
with many new Medicines. By J. Forbes Royle, M D., F.R.S., &c. 261 
Wohler's Process for the preparation of Pure Hydrocyanic Acid, . 274 
Examination of the Castoreum of Siberia. By Fr. Miiller, . . 276 
Improvements in making the Cyanides and Ferrocyanides of Potassium 
and Sodium. By James Laming, ..... 277 
On Turpentine-Camphor. By W. Wiggers, . . . 286 
Observations on Magnesia as an Antidote to Arsenic. By Dr. Christison, 287 
On a New Process for obtaining Formic Acid, and on the preparation 
of Aldehyde and Acetic Acid by the use of the Bichromate of Po 
tassa. By Professors W. B. Rogers and R. E. Rogers of the Uni- 
versity of Virginia, ...... . . 289 
New Process of Refining and Purifying Animal and Vegetable Oils 
and Grease. By Peter Bancroft, ... . 297 
On the Influence of Protoxide of Nitrogen upon Vegetation. By M. 
Vogel, Jr., : . . 300 
On the Examination of Balsam of Copaiba. By M. Oberdoffer, . 302 
On the Red Colour of the Protosalts of Manganese. By A. Volker, . 306 
On the Action of Ferrocyanide of Potassium on the Tartrate and Citrate 
of Iron ; and of Tartaric Acid simultaneously with Ammonia, on 
Prussian Blue. By M. Ch. Calloud, 310 
On the Employment of Chlorine and Hydrochloric and Sulphuric Acids 
for the Preservation of Leeches, ...... 313 
Meeting of the Board of Trustees, 314 
Necrology, . . . • . • . . . .315 
MlSCELLaNT, 317 
