IV CONTENTS OF VOL. XXXVIII. — FOURTH SERIES. 



Page 

 Capt. F. W. Hutton's Description of Nga Tutura, an Ex- 

 tinct Volcano in New Zealand 73 



Mr. J. W. Mason on Dakosaurus 74 



Mr. P. M. Duncan on the Anatomy of the test of Amphi- 

 detus (Echinocardium) Virgi?iianus, Forbes ; and on the 



genus Breynia 74 



Mr. H. Bauerman's Notes of a Geological Reconnaissance 



in Arabia Petrsea 75 



On the Heat consumed in Internal Work -when a Gas dilates 



under the Pressure of the Atmosphere, by M. J. Moutier . . 76 

 Investigations on obscure Calorific Spectra, by M. Desains. ... 78 



NUMBER CCLIIL— AUGUST. 



M. G. Quincke on the Constants of Capillarity of Molten 



Bodies 81 



Canon Moseley on the Descent of a Solid Body on an Inclined 



Plane when subjected to alternations of Temperature 99 



Mr. R. Moon on the Structure of the Human Ear, and on the 



Mode in which it administers to the Perception of Sound . . 118 

 Captain F. W. Hutton on the Mechanical Principles involved 



in the Sailing Flight of the Albatros. 130 



Mr. J. Parnell on a new Fluorescent Substance 136 



Dr. E. "Warburg on the Heating produced in Solid Bodies 



when they are Sounded 138 



Proceedings of the Royal Institution : — 



Mr. J. N. Lockyer on Recent Discoveries in Solar Physics 



made by means of the Spectroscope 142 



Proceedings of the Royal Society : — 



Dr. Tyndall on the Formation and Phenomena of Clouds. 156 

 Dr. A. Dupre and Mr. F. J. M. Page on the Specific Heat 

 and other physical properties of Aqueous Mixtures and 



Solutions 158 



Proceedings of the Geological Society : — 



Mr. H. Bauerman on the occurrence of Celestine in the 



Tertiary Rocks of Egypt 162 



Dr. P.M. Duncan on the Echinodermata, Bivalve Mollusca, 

 and some other Fossils from the Cretaceous Rocks of 



Sinai 163 



M. C. Martins on the Existence during the Quaternary 



Period of a Glacier of the Second Order 163 



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. Said-Effendi 165 



On the Heat developed in Discontinuous Currents, by MM. Ja- 

 min and Roger , 166 



