IV CONTENTS OF VOL. XVI, — FOURTH SERIES. 



Page 

 M. W, G. Hankel on the Development of Electricity between 



Metals and Heated Salts 101 



Mr. A. S. Couper on a New Chemical Theory 104 



Prof. Sylvester on the Algebraical Theory of Derivative Points 



of Curves of the Third Degree 116 



Prof. Pliicker on the Action of the Magnet upon the Electrical 



Discharge in Rarefied Gases. (With a Plate.) 119 



Dr. Atkinson's Chemical Notices from Foreign Journals 135 



Proceedings of the Royal Society : — 



Prof. Kolliker on the Poison of the Upas Antiar 140 



Major-General Sabine on the Magnetic Observations trans- 

 mitted from York Fort in Hudson's Bay, in August 1857. 143 

 Proceedings of the Cambridge Philosophical Society : — 



Mr. Candy on a Physiological Alphabet 150 



Prof. Sedgwick on a series of dislocations which have 

 moved the Cambrian and Silurian Rocks between Leven 



Sands and Duddon Sands 155 



Prof. De Morgan on the Beats of Imperfect Consonances. 158 

 On the Fluorescence of a Solution of Fraxine which appears 

 under certain circumstances of a yellow colour, by the Prince 



Salm-Horstmar 159 



Note on Internal Conical Refraction, by Dr. P. Lech 159 



On the Influence of Pressure on Chemical Affinity, by Dr. Lothar 

 Meyer 160 



NUMBER CVI.— SEPTEMBER. 



Dr. Hirst on Equally Attracting Bodies 161 



Prof. Schonbein on the Allotropic Modifications of Oxygen, and 



on the Compound Nature of Chlorine, Bromine, &c 178 



Prof. J. Le Conte's Preliminary Researches on the alleged In- 

 fluence of Solar Light on the Process of Combustion 182 



Mr. T. H. Henry on the Separation of Nickel and Cobalt from 



Manganese 197 



^Ir. C. W. Merrifieldon the Geometry of the ElHptic Equation. 198 

 Dr. Atkinson's Chemical Notices from Foreign Journals .... 209 

 Proceedings of the Royal Society : — 



Dr. Matthiessen on the Electric-conducting Power of the 



Metals, and on the Thermo-electric Series 219 



Mr. A. Cayley on the Theory of Matrices 223 



Prof. Haughton on the Physical Structure of the Old Red 



Sandstone of the County of Waterford 224 



Mr. L. Horner on the Geological History of the Alluvial 



Land of Egypt 225 



Proceedings of the Cambridge Philosophical Society : — 



Prof. Thompson on the Sophista of Plato 229 



Prof. Miller on a simple i)roof of the principle of Amsler's 

 Planimctcr 230 



