CONTENTS OF VOL. XXXIX. FOURTH SERIES. V 



Page 

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



Mode in which it administers to the Perception of Sound . . 248 

 Prof. Challis on a new discussion of the Mathematical Theory 



of Oceanic Tides 260 



Prof. How's Contributions to the Mineralogy of Nova Scotia . . 275 



Prof. Tyndall on the Polarization of Heat 280 



Prof. F. Guthrie on V — 1 .\ . . 282 



Mr. J. A. Wanklyn on the Action of the Alkali-metals on the 



Ethers of the Fatty Acids 286 



The Rev. J. M. Heath on the Circumstances which determine 

 the Variation of Temperature in a Perfect Gas during Ex- 

 pansion and Condensation 288 



Messrs. B. Silliman and H. Wurtz's Investigation of Flame- 

 temperatures, in their Relations to Composition and Lumi- 

 nosity. — First Memoir 290 



Mr. J. P. Harrison on Solar Radiation in connexion with Cloud 



and Vapour 299 



Notices respecting New Books : — 



Mr. F. Edwards's Our Domestic Fireplaces 300 



Dr. A. M. Mayer's Lecture-notes on Physics 302 



Mr. E. Dexter's Theory of Existence 302 



Proceedings of the Royal Society : — 



Mr. W. H. L. Russell on the Mechanical Description of 



Curves 304 



Prof. W. J. M. Rankine on the Thermodynamic Theory of 



Waves of Finite Longitudinal Disturbance 306 



Mr. F. Guthrie on Approach caused by Vibration 309 



Messrs. E. Frankland and B. F. Duppa on the successive 

 Action of Sodium and Iodide of Ethyle upon Acetic Ether. 309 

 Proceedings of the Geological Society :— 



Mr. G. W. Ormerod on the Structure of the Granite on 



the Eastern side of Dartmoor 313 



Mr. D. Mackintosh on Lithodomous Perforations on the 



Hills of North-west Lancashire 313 



Prof. J. Nicol on the Parallel Roads of Glen Roy 314 



Mr. J. C. Ward on Beds of supposed " Rothliegende " age 



near Knaresborough 314 



Researches on Solar Radiation, by MM. P. Desains and E. 



Branley 315 



Avogadro's Law deduced from the Fundamental Conception of 

 the Mechanical Theory of Gases, by Alex. Naumann 317 



NUMBER CCLXII.— MAY. 



M. F. J. Pictet on the present state of the question as to the 



Limits of the Jurassic and Cretaceous Periods 321 



Prof. J. C. Draper on an Improvement in Filtration . . 335 



