CONTENTS. IX 



CHEMISTRY. 



Page 

 Address by W. A. Miller, M.D., F.R.S. &c.. Professor of Chemistry, King's 



College, London 75 



Professor ANDERso>f on the Constitution of Paranaphthaline or Anthracene, 



and some of its Decomposition Products 76 



Professor Andrews on the Effect of Great Pressures combined with Cold on 



the Six Non-condensable Gases 76 



Dr. Grace Calvert on the Chemical Composition of some Woods employed 



in the Navy 'j'j 



on the Chemical Composition of Steel 77 



Professor Daubeny on the Evolution of Ammonia from Volcanos 77 



Mr. H. Deane on a particular Decomposition of Ancient Glass 78 



Dr. Delffs on Morin, and the non-existence of Morotannic acid 78 



Mr. G. C. Foster on Piperic and Hydropiperic Acids 78 



Professor Galloway on the Composition and Valuation of Superphosphates... 79 



Dr. J. H. Gladstone and Mr. G. Gladstone on an Aluminous Mineral from 



the Upper Chalk near Brighton 7g 



Dr. J. H. Gladstone on the Emission and Absorption of Rays of Light by 



certain Gases 79 



Mr. W. Gossage on the History of the Alkali Manufacture 80 



Mr. J. J. Griffin on the Construction of Gas-Burners for Chemical Use 81 



Mr. W. J. Hurst on the Sulphur Compound formed by the Action of Sulphu- 

 retted Hydrogen on Formiate of Lead at a High Temperature 82 



Dr. Joule and Professor W. Thomson on the Thermal Effects of Elastic Fluids 83 



Mr. J. B. Lawes and Dr. J. H. Gilbert on some points in connexion with 



the Exhaustion of Soils 84 



Dr. J. H. Lloyd on Purifying Towns from Sewage by means of Dry Cloacae... 83 



Dr. S. Macadam on the Proportion of Tin present in Tea- Lead 85 



on the Proportion of Arsenic present in Paper-Hangings 86 



on an Economical Mode of boiling Rags, &c. with AlkalineLey 86 



Mr. W. Marriott on the Separation of Ammonia from Coal-gas 86 



Mr. John Mercer on Madder Photographs 87 



Professor W. A. Miller on Photographic Spectra of the Electric Light 87 



Dr. Moffat on Atmospheric Ozone 88 



on Sulphuretted Hydrogen as a Product of Putrefaction 89 



Mr. William Roberts on the Solvent Power of Strong and Weak Solutions 



of the Alkaline Carbonates on Uric Acid Calculi 90 



Professor Roscoe on Perchloric Acid and its Hydrates 91 



Drs. Russell and Matthiessen on Vesicular Structure in Copper 92 



Dr. Smith (of Sydney) on certain Difficullies in the way of separating Gold 



from Quartz 92 



Professor Tennant on a Specimen of Meteoric Iron from Mexico 93 



Mr. Charles Tomlinson on the Cohesion-Figures of Liquids 93 



Dr. Voelcker on the Composition of Crystallized Moroxite, from Jumillo, 



near Alicante 93 



Dr. Wallace on the Composition and Properties of the Water of Loch Katrine, 



as supplied in Glasgow 94 



