CONTENTS. 
V 
No. III. 
Observations on Asarum Canadense, and Asavum Europceum. By 
William Procter, Jr., - 177 
Pharmaceutical Notices. No. xx. By William Procter, Jr., 183 
Note on Vanilla, ------- 190 
On the Action of Sal Ammoniac on Iodide of Potassium, and upon 
a peculiar mode of external use of this Salt. By M. Vogel 
de Munich, - - - - - - 195 
On the Limit to the Action of Certain Chemical Reagents, - 200 
On the Most Important Chemical Manufactures carried on in 
Glasgow and the Neighborhood. By Professor Thomas 
Thomson, of Glasgow, F. R. S., - - - - 206 
On Pollen and Vegetable Impregnation, - - - - £16 
Views of Professor Liebig on Poisons, Contagions, and Miasms, 218 
On the Constitution and Product of the Distillation of Fat Bodies. 
By Professor Redtenbacher and Dr. Varrentrapp, - - 220 
On a New Fat Acid. By Dr. Playfair, - - - - 221 
A New Mode of Estimating Nitrogen in Organic Analysis. By 
Professor Bunsen, of Marlburg, - 222 
On Bleaching Vegetable Wax. By Mr. E. Solly, - - 223 
Compound of Iodide of Sodium and Iodate of Soda, - - 224 
On the Action of Nitric Acid on the Chlorates, Iodates, and 
Bromates of Potassa and Soda. By Professor Frederic 
Penny, ------- 225 
On the Solvent Power exercised by Water, at High Temperature, 
on Siliceous Minerals. By Julius Jeffreys, - - 227 
Source and Assimilation of the Nitrogen of Plants, - - 230 
An Examination of the Testimony relative to the Efficacy of the 
Hydrated Peroxide of Iron as an Antidote to Arsenic, with 
Directions for its Preparation and Exhibition. By T. 
Romeyn Beck, M. D., - - - - 239 
An Account of some Recent Improvements in Photography. By 
H. F. Talbot, Esq., F. R. S. - - - - 247 
New Mode of Preparation of the Daguerreotype plates, by which 
Portraits can be taken in the short space of from five to 
fifteen seconds, according to the power of light. Discovered 
by A. Claudet, in the beginning of May, 1841. Communi- 
cated by the Marquis of Northampton, President R. S. - 253 
On the Spontaneous Evolution of Sulphuretted Hydrogen in the 
Waters of the Western Coast of Africa and elsewhere, - 254 
Miscellany, - 260 
