CONTENTS OF VOL. XLVIII. FOURTH SERIES. 



NUMBER CCCXYIL— SEPTEMBER. 



Pa S e 

 Captain Abney on the Opacity of the Developed Photographic 



Image 161 



Mr. C. Horner on the Behaviour of certain Fluorescent Bodies 



in Castor-oil 165 



Baron N. Schilling on the Constant Currents in the Air and 



in the Sea : an Attempt to refer them to a common Cause. 166 

 Prof. Challis on the Hydrodynamical Theory of the Action 



of a Galvanic Coil on an external small Magnet. — Part I. . . 180 

 Prof. A. Stoletow on the Magnetization-Eunctions of various 



Iron Bodies 200 



Mr. A. Tvlor on Tides and Waves. — Deflection Theory. ("With 



Three Plates.) 204 



Proceedings of the Royal Society : — 



Mr. H. E. Roscoe on a Self-recording Method of Measu- 

 ring the Intensity of the Chemical Action of Total Day- 

 light • 220 



Mr. J. Cottrell on the Division of a Sound- Wave by a 

 Layer of Elaine or heated Gas into a reflected and a trans- 

 mitted Wave 222 



Mr. A. E. Donkin on an Instrument for the Composition 



of two Harmonic Curves ; 223 



Proceedings of the Geological Society : — 



Mr. J. W. Hulke on the Anatomy of HypsUophodon 



Foxii 227 



Mr. T. Mellard Eeade on the Drift-beds of the North- 

 west of England 227 



Mr. R. D. Darbishire on a deposit of Middle Pleistocene 



Gravel near Leyland, Lancashire 228 



Mr. H. G. Eordham on the Structure sometimes deve- 

 loped in Chalk 228 



Mr. R, Pinchin on the Geology of the Eastern Province 



of the Colony of the Cape of Good Hope 229 



Lieut. A. W. Stiffe on the Mud-craters and geological 



structure of the Mekran Coast 230 



On the Light reflected by Permanganate of Potassium, by 



Dr. Eilhard Wiedemann '.231 



On the Temperature of the Sun, by M. J. Violle 233 



Physics of the Internal Earth, by D. Vaughan, Esq 237 



On the Conversion of Ordinary into Amorphous Phosphorus 

 by the Action of Electricity 239 



NUMBER CCCXYIIL— OCTOBER, 



Dr. E. J. Mills on Gladstone's Experiments relating to Che- 

 mical Mass 241 



Dr. E. W. Davy "on a very singular Sulphuretted Nitrogenous 



