CONTENTS of N° 253.— Fourth Series. 



XI. On the Constants of Capillarity of Molten Bodies. By G. 

 Quincke "page 81 



XII. On the Descent of a Solid Body on an Inclined Plane when 

 subjected to alternations of Temperature. By Henry Moseley, 

 M.A., Canon of Bristol, F.R.S., Instit. Imp. Sc. Paris, Corresp 99 



XIII. On the Structure of the Human Ear, and on the Mode in 

 which it administers to the Perception of Sound. By R. Moon, M.A., 

 Honorary Fellow of Queen's College, Cambridge 118 



XIV. On the Mechanical Principles involved in the Sailing Flight 



of the Albatros. By Captain F. W. Hutton, F.G.S. .. < 130 



XV. Note on a new Fluorescent Substance. By John Parnell, 

 M.A., F.R.A.S 136 



XVI. On the Heating produced in Solid Bodies when they are 

 Sounded. By Dr. E. Warburg 138 



XVII. Proceedings of Learned Societies : — 

 Royal Institution: — Mr. J.N.Lockyer on Recent Discoveries 



in Solar Physics made by means of the Spectroscope 142 



Royal Society: — Dr. Tyndall on the Formation and Pheno- 

 mena of Clouds ; Dr. A. Dupre and Mr. F. J. M. Page on 

 the Specific Heat and other physical properties of Aqueous 



Mixtures and Solutions 156-162 



Geological Society 162 



XVIII. Intelligence and Miscellaneous Articles : — 

 On the Compressibility of Liquids, by MM. Amaury and Des- 



camps 1 64 



Measurement of the Electrical Conductivity of Liquids hitherto 



supposed to be Insulators, by M. Sai'd-Effendi 165 



On the Heat developed in Discontinuous Currents, by MM. Jamin 



and Roger 166 



%* It is requested that all Communications for this Work may be addressed, 

 post-paid, to the Care of Messrs. Taylor and Francis, Printing Office, Red 

 Lion Court, Fleet Street, London. 



