CONTENTS OF VOL, XLIX. FOURTH SEMES. V 



Page 

 Proceedings of the Eoyal Society : — 



Messrs. F. Tiemanu and W. Haarmann on Coniferine, 

 and its conversion into the Aromatic Principle of 

 Vanilla 229 



Mr. R. Mallet on the alleged Expansion in Volume of 

 various Substances in passing by Refrigeration from 

 the state of Liquid Fusion to that of Solidification . . 231 



Mr. J. N. Lockyer on the Absorption of great Thick- 

 nesses of Metallic and Metalloidal Vapours 233 



Mr. J. N. Lockyer on the Evidence of Variation in Mo- 

 lecular Structure 235 



Proceedings of the Geological Society : — 



Principal Dawson on the Upper Coal-Eormation of East- 

 ern Nova Scotia and Prince Edward Island in its rela- 

 tion to the Permian 237 



Mr. J. G. Goodchild on the Carboniferous Conglomerates 

 of the eastern part of the Basin of the Eden 238 



Mr. R. Mortimer on a Well-section in the Chalk at the 

 North end of Driffield, East Yorkshire 239 



Dr. O. Ward on Slickensides or Rock-striations, particu- 

 larly those of the Chalk 239 



Mr. J. E. Campbell on Polar Glaciation . , 239 



Dr. E. Stoliczka on the occurrence of Jade in the Kara- 

 kash Valley, on the southern borders of Turkestan . . 240 



Mr. E. G. H. Price on the Gault of Eolkestone 240 



Mr. C. J. A. Meyer on the Cretaceous Rocks of Beer 

 Head and the adjacent Cliff-sections ; and on the rela- 

 tive Horizons therein of the Warminster and Black- 

 down Fossiliferous deposits 241 



Mr. H. G. Seeley on some of the Generic Modifications of 

 the Plesiosaurian Pectoral Girdle 241 



Mr. H. G. Seeley on Murcenosaurus Leedsii (Seeley), a 

 Plesiosaurian from the Oxford Clay. — Part 1 242 



Mr. L. C. Miall on the remains of Labyrinthodonta from 

 the Keuper Sandstone of Warwick, preserved in the 



Warwick Museum 243 



On Magnetism, by A. Treve 243 



On a New Electromagnet, formed of Concentric Tubes of Iron 



separated by Layers of Conducting Wire, by J. Camacho . . 244 

 On the Experimental Determination of Diamagnetism by its 

 Electrical Inductive Action, by Prof. A. Toepler, of Gratz. 246 



NUMBER CCCXXV.— APRIL. 



Mr. J. R. Capron on the Comparison of some Tube and other 

 Spectra with the Spectrum of the Aurora. (With Four 

 Plates.) 249 



Mr. F. Guthrie on Salt Solutions and Attached Water .... 266 



