X CONTENTS. 



Page 



Mr. E. M. DrxoN on an Apparatus for the Analysis of Impurities in the Atmo- 

 sphere 63 



Mr. J. DuNNACHEE on Fire-Brick 63 



Mr. A. Fergusson on White-Lead 63 



Professor Gamgee on the Physiological Action of Pyro-, Meta-, and Ortho- 

 phosphoric Acids 64 



Professor Gladstone on the Influence of the Condition and Quantity of the 



Negative Element on the Action of the Copper-Zinc Couple 64 



Professor Guthhie on Solid "Water 64 



Mr. W. N. Haetley on the Critical Point of Liquid Carbonic Acid in ]\Iinerals 64 



Mr. William Hendeeson on the History of Copper-extraction by theWet Way G4 



Colonel Hope on the Purification of the Clyde 64 



Mr. Chaeles T. Kingzett on the Limited Oxidation of Terpenes. — Part IV. 64 



Mr. A. C. Letts on two new Hydrocarbons from Turpentine 65 



Mr. J. Macteab on Soda Mauufactui-e 65 



Dr. Macvicae on the possible Genesis of the Chemical Elements out of a 



Homogeneous Cosmic Gaa or Common Vapour of Matter 65 



Mr. M. M. Pattison Muib on Essential Oil of Sage. — I'art 1 65 



— on the action of Dilute Saline Solutions upon 



Lead 66 



on certain Compounds of Bismuth 66 



Mr. J. A. R. Newlands on Relations among the Atomic Weights of the 



Elements 66 



on the Alum Process in Sugar-refining 66 



Mr. T. L. Patteeson on Sugar 67 



Mr. W. H. Perkin on some new Anthracene Compounds 67 



Dr. William Ramsay on Picoline and its Derivatives 67 



Dr. J. Emeeson Reynolds on Glucinum, its Atomic Weight and Specific 



Heat 68 



Mr. W. C. SiLL.ui on the Utilization of Sewage 68 



Mr. R. D. Silva on the Action of Hydriodic Acid on mixed Ethers of the 



General Formula C„H2n+i-l-0 . CH3 68 



Mr. Anderson Smith on Sodium 68 



Mr. Edwaed C. C. Stanfoed on the Manufactm-e of Iodine 68 



Mr. J. E. Stoddaet on Lead Desilverizing by the Zinc Process 69 



Mr. J. Johnstone Stoney on the Atomicity of Oxygen and on the Constitu- 

 tion of Basic Salts 69 



Mr. D. Swan on Zinc 69 



Rev. R. Thomson on the Prevention of the Pollution of Rivers 70 



Mr. William Thomson on the Growth of Mildew in Grey Cloth 70 



Dr. W. A. TiLDEN on the Nitroso Derivatives of the Terpenes 70 



on a new Iso-purpui-ine 70 



Mr. F. Waed on the Prevention of Fraudulent Alterations in Cheques &c 70 



Mr. Waiter Weld on on the Means of Suppressing Alkali Waste 70 



Dr. C. R. Aldeb Wright on New Cotamine Derivatives 70 



on the Alkaloids of the Aconites 71 



GEOLOGY. 



Address by Professor J. Young, M.D., F.G.S., President of the Section 72 



His Grace The Duke of Argyll on the Physical Structure of the Highlands 



in connexion with their Geological History 81 



Major Beaumont on the Sub-Wealden Exploration 87 



