X CONTENTS. 



Page 



Ur. Oni) ou tlie Crystallizatiou of Salts in Colloid Soliitious 7"J 



Ilerr G-. tom Eath — The Crystallograpliic System of Leucite, hitherto sup- 

 posed to be regular, is quadratic 79 



Mr. W. Chandler Roberts on a Curve Illustrating the British Gold Ooiuage 82 



Dr. E. ScHENK on the Amount of Heat required to raise Elementary Bodies 



from the absolute zero to their state of Fusion 82 



Mr. T. E. Thorpe on an improved form of Filter Pump 83 



I\Ir. Alfred Tribe on the Precipitation of Silver by Copper 84 



Mr. Gr. Un-win, Specimens of Agate and other Natural Colloid Silica ex- 

 hibited b)\ 85 



Mr. J. F. Walker on Dinitrobrombenzene 85 



Mr. J, Alfred Waniclyn on the Continuous Production of Oxygen 85 



on some New Methods of Analyzing the Ethers. . 85 



Mr. Walter Weldox on the Manufacture of Chlorine by means of Manga- 



nite of Magnesium 86 



Mr. John Williams on the Preparation of Guarauine 80 



Dr. T. Wood on Teaching Elementary Chemistry to Boys under 14 years of Age 87 



Mr. C. J. Woodward on a Modification of Ilofmaun's Apparatus for Electro- 

 lysis of Water 87 



Dr. C. R. A. Weight on New Derivatives from Morphine- and Codeine 87 



GEOLOGY. 



Address by Robert A. C. Godwin-Austen, F.R.S., F.G.S., Szc, President 

 of the Section 90 



Dr. William B. Carpenter on the Temperature and other Physical Condi- 

 tions of Inland Seas, in their relation to Geological Inquiry 9G 



Mr. W. Carrtjthers on the Tree Ferns of the Coal-measures, and their Affi- 

 nities with existing Forms 98 



Mr. Thomas Davidson on the present state of our hnowledge in connexion 

 with the Brachiopoda 99 



• and Dr. WiLLiAjf King on the Genera Trimerella, 



Dinoholus, and Monomcrella 100 



Mr. W. Boyd Dawkins on the Physical Geography of the Mediterranean 

 during the Pleistocene Age 100 



Professor Albert Gaudry on the Fossil Animals of Mount Leberon (Vancluse) 1C2 



The Rev. J. Gunn ou the Prospect of finding Productive Coal-measures in 

 Norfolk and Suflbllv:, with Suggestions as to the place v.'here an experi- 

 mental Boring should be made 102 



Professor James ITall on the occun-ence of Trunks of Psaronius in an erect 

 position, resting on their original bed, in Rocks of Devonian age in the State 

 of New York ; with some Inferences regarding the Condition of the Sea- 

 bottom and Shore-line during the Deposition of the Strata 103 



on the Relations of the Middle and Upper Silurian 



(Clinton, Niagara, and Lower Helderlierg) Rocks of the United States .... 103 



Professor Hhbert on the Challc of the Paris Basin 104 



Mr. Henry Hicks on the Cambrian and Silurian Rocks of Ramsey Island, 

 St. David's 107 



Mr. John Hopkinson on the Graptolites of the Arenig Rocks of St. David's . 107 



