THE QUARTERLY JOURNAL OF THE CHEMICAL SOCIETY OF LONDON LONDON HIPPOLYTE BAILLIERE 219 REGENT STREET AND 290 BROADWAY NEW YORK U.S. PARIS J. B. BAILLIERE RUE HAUTEFEUILLE MADRID BAILLY BAIZfiIERE CALLE DEL PRINCIPE. 1859. LONDOK PRINTED BY HARRISON AND SONS ST. MARTIN’S LANE w c. CONTENTS OF THX ELEVENTH VOLUME. PAGE Xote on Rosolic Acid. By Dr. Hugo Miiller ........................................ 1 On the Arseniates of Baryta Lime and Magnesia and the Separation of Arsenic from other Elements. By Frederick Field M.R.I.A. F.C.S. ...... 6 On the existence of a Second Crystallizable Fluorescent Substance (Paviin) in the Bark of the Horse-Chestnut. By Q. Q. Stokes M.A. Sec. R.S. &c.17 On the Action of Bromine on Acetic Acid. By W. H. Perkin F.C.S. and B. F. Duppa Esq. .................................................................. 22 On the Use of Gas as Fuel in Organic Analysis. By A. W. Hofmann ............ 30 On the Chemical Action of Water on Soluble Salts. By Dr. J. H. Gladstone F.R.S ....................................................................................... 36 Proceedings at the Xeetings of the Chemical Society ................................ 50 On aome Compounds of Iodide and Bromide of Mercury with the Alkaloids. By Thomas B. Groves F.C.S. Weymouth .......................................... 97 On a new method of preparing Propionic Acid viz. by the action of Carbonic Acid upon an Ethyl-compound.By J. A. Wanklyn Esq. ..................... 103 Notice of another New Xaximum and Minimum Mercurial Thermometer. ByJohn Q. Macvicar D.D. Moffat ..................................................... 106 On the Atomic Weights of Oxygen and Water. By William Odling M.B. Secretary to the Chemical Society .................................................. 107 On the General Character8 of the Iodo-Sulphates of the Cinchona-Slkaloida. By W. Bird Herapath M.D. F.R.S.E. ............................................ 130 Some remarks on Poison obtained from Arrows. By Henry J. B. Hancock Esq. 154 On the Composition and Analysis of Black Ash or Ball Soda. By Josiah W. Kynaston Esq. Student in the Liverpool College of Chemistry............... 155 Process for the quantitative estimation of Sulphides Sulphites Hyposulphites and Sulphates in presence of each other as adopted in the determination of these Salts in “Soda Waste,” as obtained from “Black Ash.” By J. W. Kynaston Esq. Student in the Liverpool College of Chemistry ..... 166