X CONTENTS. 



Page 



Dr. A. MATTHrESSEN and C. R. Wbioht^oii the Action of Hydi-ocliloric Acid 



on Morphia Codeia GO 



Mr. W. D. INIiTCHELi., Are Flint Instruments of the first Stone Age found in 



the Drift ? 69 



Dr. Stevenson Macadam on the Economic Distillation of Gas from Cannel- 



Coal 09 



Dr. Thomas Moffat on the Oxidation of Phosphorus, and the Quantity of 

 Phosphoric Acid excreted by the Kidneys in Connexion with Atmospheric 

 Conditions 72 



on the Phosphorescence of the Sea and Ozone 72 



Dr. A. Oppenheim on Aceto-sulphu .ic Acid 72 



on Bromo-iodide of Mercury , 72 



Dr. T. L. Phipson on the Solubility of Lead and Copper in pure and impure 



Water 73 



on some new substances extracted from the Walnut .... 74 



Mr. William Chandler Roberts on a specimen of Obsidian from Java . . 74 



Sir. W. J. Russell on the Measurement of Gases as a branch of Volumetric 



Analysis 74 



Mr. H. C. SoRBY on Jai-gonia 75 



Mr. Peter Spence on raising a Temperature higher than 212° F. in certain 



Solutions by Steam of 212° F 75 



Mr. Edw. C. C. Stanford on a Chemical Method of treating the Excreta of 



Towns 76 



Mr. Charles Tomlinson on a remarkable Structural Appearance in Phosphorus 78 



on the Supposed Action of Light on Combustion. ... 78 



Mr. Walter Weldon on the Manufactm-e of Chlorine by means of perpetu- 

 ally regenerated Manganite of Calcium 79 



Mr. Stephen Williajis on the Action of Phosphoric Chloride on Hydiic 



Sulphate 82 



GEOLOaT. 



Address by Professor Harkness, F.R.S., President of the Section 82 



Mr. Robert Brown on the Elevation and Depression of the Greenland Coast 85 



Mr. William C.arruthers on Reptilian Eggs from Secondary Strata 86 



on " Slickensides " 86 



Mr. ErGENE A. Conwell on a Fossil Mussel-shell foimd in the Drift in Ire- 

 land 87 



Mr. Robert Ethehidge on the occurrence of a large Deposit of Terra-Cotta 



Clay at Watcombe, Torquay 87 



Mr. T. Davidson's Notes on the Brachiopoda hitherto obtained from the 



"Pebble-bed" of Budleigh-Salterton, near Exmouth in Devonshire .... 88 



Mr. C. Le Neve Foster on the Occurrence of the Mineral Scheelite (Tung- 

 state of Lime) at Val Toppa Gold Mine, neai- Domodossola, Piedmont . . 88 



Mr. R. A. C. Godwin- Austen on the Devonian Group considered Geologically 



and Geograpliically 88 



Dr. HiCKs's Notes on the Discovery of some Fossil Plants in the Cambrian 



(Upper Longmynd) Rocks, near St. David's 90 



Mr. H. H. Howorth on the Extinction of the Mammoth 90 



