Vi CONTENTS OF VOL. XVI. FOURTH SERIES. 



Page 

 Dr. Donaldson on the Statue of Solon mentioned by 



iEschines and Demosthenes 317 



Dr. Paget on some Instances of remarkable Defects in 



the Voluntary Muscles 317 



Mr. H. F. Baxter on Organic Polarity 318 



On the Double Tangents to Plane Curves, by the Rev. George 



Salmon, Trinity College, Dublin 318 



On the Electro-magnetic Rotation of Liquids, by A. Berlin . . 319 



NUMBER CVIII.— NOVEMBER. 



Mr. J. Bridge on the Diffraction of Light 221 



Mr. R. Cartmell on a Photochemical Method of recognizing 



the Non- volatile Alkalies and Alkaline Earths 328 



Prof. Tyndall on some Physical Properties of Ice 333 



Mr. A. Cayley on a Theorem relating to Hypergeometric Series. 356 

 Dr. Wallace on Chloro-arsenious Acid, and some of its Com- 

 pounds 358 



Dr. Atkinson's Chemical Notices from Foreign Journals .... 361 

 Prof. Sylvester on the Equation in Numbers of the First Degree 



between any number of Variables with Positive Coefficients. 369 

 Prof. Sylvester on the Problem of the Virgins, and the general 



Theory of Compound Partition 37 1 



Proceedings of the Royal Society : — 



Mr. T. S. Hunt on the probable Origin of some Mag- 



nesian Rocks 376 



Mr. C. G. Williams on the Constitution of the Essential 



Oil of Rue . 380 



Messrs. F. C. Calvert and R. Johnson on the Relative 



Power of Metals and their Alloys to conduct Heat .... 381 

 Mr. A. Cayley on the Surface which is the Envelope of 

 Planes through the Points of an Ellipsoid at right 



angles to the Radii Vectores from the Centre 383 



Professors A. Kiilliker and E. Pelikan on the Physiolo- 

 gical Action of the Tanghinia venenifera 384 



Dr. Alison on the Differential Stethophone 385 



Proceedings of the Geological Society : — 



Dr. Abich on the History and Formation of Etna 395 



Lieut. Godwin- Austen on the Lacustrine or Kar^wah De- 

 posits of Kashmir 395 



The Rev. S. Haughton on the Black Mica of the Granite 



of Leinster and Donegal 396 



Mr. T. F. Jamieson on an Outlier of Lias in Banffshire. . 397 



Prof. Owen on a Collection of Australian Fossils 397 



.Mr. J. Brown on the Occurrence of some Tertiary Fossils at 

 Chislet 397 



