CONTENTS. 



V 



Page 



Mr. T. Richardson on the Composition of Idocrase 52 



Dr. Charles Upham Shepard's Observations on Meteoric Iron found 



in different parts of the United States of America 54 



Mr. R. Phillips on the Synthetical Composition of White Prussiate of 



Potash 56 



Dr. G. O. Rees on the existence of Fluoric Acid as a constituent of certain 



Animal Substances 5" 



Professor Hess's Description of an Apparatus for the Analysis of Or- 

 ganic Substances 57 



Dr. R. D. Thomson on the Proofs of the existence of free Muriatic Acid 



in the Stomach during Digestion 58 



Rev. T. ExLEY on the Elementary Constitution of Organic Substances . 58 



Dr. Ure's Experiments on Fermentation, with some general remarks • 59 



Mr. Benson on the theory of the formation of White Lead 60 



Dr. Mackay on Matias Bark 61 



Mr. Charles Thornton Coathupe on an improved method of gradu- 

 ating Glass Tubes for Eudiometrical purposes 62 



Mr. Charles Thornton Coathupe's Notice of an Apparatus for deter- 

 mining the quantity of Carbonic Acid Gas in deteriorated atmospheres 63 



Baron Eugene de Menil on a New Safety Lamp 64 



Dr. D. B. Reid's Notice of a Chemical Abacus 65 



Count du Valmerino's Remarks on Gas-Lighting 65 



GEOLOGY. 



Mr. William Sharp on the Formation of Local Museums . . . .65 

 Mr. C. LvELLonthe Origin of the Tubular Cavities filled with Gravel and 

 Sand, called " Sandpipes," in the Chalk near Norwich ; with Addi- 

 tional Facts by J. B. Wigham, Esq 65 



Mr. J. G. Marshall's Description of a Section across the Silurian Rocks 

 in Westmoreland, from the Shap Granite to Casterton Fell .... 67 



Mr. J. A. Knipe on a Basaltic Dyke in the Vale of Eden 67 



Rev. D. Williams on the Geological Horizon of the Rocks of S. Devon 

 and Cornwall, as regards that Section of the great Grauwacke Group 

 comprised in the counties of Somerset, Devon and Cornwall. ... 68 

 Mr, R. A. C. Austen's Note on the Organic Remains of the Limestones 



and Slates of South Devon 69 



Mr. Thomas Oram on the Economy of Fuel 69 



Mr. C. Lyell on Remains of Mammalia in the Crag and London Clay of 



Suffolk 69 



Mr. W. Maerat on the Discovery of an Ichthyosaurus 70 



