Vlll CONTENTS OF VOL. XXVII. — FOURTH SERIES. 



Page 



Dr. Atkinson's Chemical Notices from Foreign Journals 496 



M. E. Jochmann on the Electric Currents induced by a Magnet 



in a Rotating Conductor. (With a Plate.) 506 



Mr. C. Tomlinson on the Motions of Eugenic Acid on the Sur- 

 face of Water. (With a Plate.) 528 



Dr. Gibbs on the Determination of Nitrogen by Weight .... 537 

 Proceedings of the Royal Society : — 



Sir John F. W. Herschel on the Theory of the Motion of 



Glaciers 539 



Mr. W. Huggins on the Spectra of some of the Chemical 



Elements 541 



Proceedings of the Geological Society : — 



Sir R. I. Murchison and Prof. R. Harknesson the Permian 



Rocks of the North-west of England 542 



Mr. J. Wyatt on further discoveries of Flint Implements 



and Fossil Mammalia 543 



Mr. J. Evans on some Recent Discoveries of Flint Imple- 

 ments in Drift Deposits in Hants and Wilts 544 



Mr. E. R. Lankester on the Discovery of the Scales of 



Pteraspis 544 



Mr. G. E. Roberts on some Remains of Bothriolepis from 



the Upper Devonian Sandstones of Elgin 545 



Dr. Bigsby on Missing Sedimentary Formations, from Sus- 

 pension or Removal of Deposits 545 



On the Appearances of the Sun's Disk, by C. G. Talmage, Esq. 545 

 On the Yellow Coloration of Faded Photographic Prints, by M. 



Carey Lea 546 



Index 548 



PLATES. 



I. Illustrative of Mr. S. V. Wood's Paper on the Formation of the 

 River- and other Valleys of the East of England. 



II. Illustrative of Mr. C. Tomlinson's Paper on the Electrical Fly. 



III. Illustrative of Prof. Magnus's Paper on the Condensation of Vapours 



on the Surfaces of Solid Bodies. 



IV. Illustrative of Mr. C. Tomlinson's Paper on a new Variety of the 



Cohesion-Figures of Liquids. 



V. Illustrative of M. E. Jochmann's Paper on the Electric Currents in- 

 duced by a Magnet in a Rotating Conductor. 



VI. Illustrative of Mr. C. Tomlinson's Paper on the Motions of Eugenic 

 Acid on the Surface of Water. 



VII. Illustrative of Mr. J. J. Waterston's Paper on Liquid Expansion. 



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