CONTENTS. 13C 



Page 



Mr. P. Bkaham's further Experiments on Crystallization of Metals by Elec- 

 tricity • "^ 



Mr. Henry T. Chamberlain on the Manufacture and Eefining of Sugar in 

 Bristol, 1875 , ^^ 



Mr. F. Clowes on the Action of Ethyl-hromohutyrate upon Ethyl-sodaceto- 

 acetate ^' 



Mr. Thomas Davet on the Tobacco Trade of Bristol 40 



Mr. A. S. Davis on a simple Method of Determining the Proportion of Car- 

 bonic Acid in Air 



Dr. Debus on the Chemical Theory of Gunpowder 40 



Mr. Sparke Evans on the Manufacture of Sole-leather in Bristol 41 



Mr. T. Fairley on the Separation of Lead, Silver, and Mercury, with a pro- 

 posed process for estimation of Lead 4^ 



on a new Method of preparing Periodates, with Application 



as a Test for Iodine and Sodium 4^ 



on new Solvents for Gold, Silver, Platinum, &c., with an 



Explanation of the so-called Catalytic Action of these Metals and their 

 Salts on Hydrogen Dionide 4^ 



on the Use of Potassium Dichromate in Grove's and Bunsen's 



Batteries to ensure constancy *" 



Mr. J. W. Gatehouse on Nitrite of Silver 43 



Dr. J. H. Gladstone on the Relation of the Arrangement of the Acids and 

 IBases in a Mixture of Salts to the original manner of Combination 43 



and Mr. Alfred Tribe on the Action of the Copper- 

 Zinc Couple 4-j 



. on the Augmentation of the 



Chemical Activity of Aluminium by contact with a more Negative Metal . 4." 



Mr. A. "S'ernon Harcourt on an Apparatus for estimating Carbon Bisul- 

 phide in Coal-gas 43 



Messrs. L. Jackson and A. Oppenheim on Derivatea of Mercaptan 43 



Mr. Charles T. Kingzett on the Oxidation of the Essential Oils.— The 

 Limited Oxidation of Terpenes and Cymene 43 



Mr. J. C. Melliss on the Treatment of Sewage 4-5 



Mr. A. Oppenheim on Onynoitic Acid 45 



Dr. T. L. Phipson on Noctilucine • 4o 



Mr. "William Thomson on Apparatus and Modes of Examination for the 



Source of Polluted Air 45 



Professor T. E. Thorpe on a new Gaseous Compound of Fluorine and Phos- 

 phorus ^^ 



Dr. William A. Tilden on the Crystalline Constituents of Aloes 4G 



Dr. John Watts on Miintz and Ramspacher's Apparatus for the Estimation 



of Tannic Acid 4G 



GEOLOGY. 



Address by Thomas Wright, M.D., F.R.S.E., F.G.S., President of the 

 Section 4 / 



o 



