IV CONTENTS, 
No. II. 
On Cantharis Vesicatoria. By Robert Coulton Davis, - 81 
On Prepared Iron. By Alexander H. HofT, 89 
On the Decomposition of Carbonic Acid and the Alkaline Car- 
bonates by the Light of the Sun. By John W. Draper, 
M. D., Professor in the University of New York City, - 91 
On the Double Salts of Iron. By Mr. Hemingway, 96 
On Matico. By Mr. T. R. N. Morson, - - - - 105 
On Mr. Pattinson's Magnesia Alba, and on the Composition of 
that Substance generally. By George Fownes, Ph. D., - 113 
On the Formation of Hydrocyanic Acid from the Reaction of Ni- 
tric Acid on Alcohol. By M. Dalpaiz, - 115 
On the Heavy Carbonate and Calcined Magnesia. By Mr. Rich- 
ard Phillips, Jun., 117 
On Radix Sumbul, the Persian Musk Root. By H. Reinsch and 
M. Buchner, 119 
On Opium. By M. Texier, - - - 122 
On Madder. By M. Girardin, Professor of Practical Chemistry 
at the Municipal School of Rouen, - 123 
On the Preparation of Mercurial Ointment. By M. Fossembras. 134 
Researches on Narcotine and the Products of its Decomposition. 
By Prof. Wohler, 136 
Preparation of the Perchloride of Iron. By M. Gobley, - - 142 
On the Hadshy of the Turks. By M. Landerer, - - - 147 
On the Crajuru or Carajuru and Chica, a New Red Tinctorial 
Substance from South America. By J. J. Virey, - - 149 
On Two Kinds of Vegetable Wax, from Brazil. By M. Sigaud,1 151 
List of Graduates, - -- -- -- - 153 
Miscellany, - -- -- 154 
