iv CONTENTS OF VOL. II. FOURTH SERIES. 



NUMBER IX.— AUGUST. 



Page 

 Mr. I. B. Cooke on the Measurement of Chemical Affinity . . 85 

 Prof. Boole's Further Observations on the Theory of Probabi- 

 lities 96 



M. R. Clausius on the Moving Force of Heat, and the Laws 

 regarding the Nature of Heat itself which are deducible there- 

 from 102 



Mr. R. P. Greg's Descriptionof Matlockite, anew Oxychloride 



ofLead 120 



Prof. O'Brien on Symbolical Mechanics 121 



Mr. P. J. Martin on the Anticlinal Line of the London and 



Hampshire Basins (continued) 126 



Messrs. Galbraith and Haughton on the Apsidal Motion of a 



freely suspended Pendulum 134 



M. R. Clausius* Reply to a Note from Mr. W. Thomson on 



the Effect of Fluid Friction, &c 139 



Mr. J. J. Sylvester on a certain Fundamental Theorem of De- 

 terminants 142 



Proceedings of the Royal Astronomical Society 145 



• Royal Society 149 



Pendulum Experiments, by Thomas G. Bunt 158 



Pendulum Experiments : — Formula for Calculating the Apsidal 



Motion, by A. Thacker 159 



On Atmospheric Shadows, by Prof. E. Wartmann 160 



On the Artificial Formation of Corundum and Diaspore by the 



Wet Method, by M. H. De Senarmont 161 



The Theory of Sound 162 



Meteorological Observations for June 1851 163 



* Table 164 



NUMBER X.— SEPTEMBER. 



Dr. Tyndall on Diamagnetism and Magnecrystallic Action .... 165 

 Mr. P. J. Martin on the Anticlinal Line of the London and 



Hampshire Basins (continued) 189 



Mr. C. L. Dresser's Experiments on the Conducting Powers of 



Wires for Voltaic Electricity 198 



Mr. M.Donovan's Suggestions for the Preparation of Phosphorus 202 

 The Rev. A. Weld's Account of a remarkable Flood at Chipping 



in Lancashire 209 



Messrs. Gladstone on the Growth of Plants in various Gases. . 215 

 Mr. J. J. Sylvester on Extensions of the Dialytic Method of 



Elimination 221 



Mr. R. Phillips on the Magnetism of Pewter Coils 230 



Proceedings of the Royal Society 238 



On the Artificial Production of Crystallized Minerals, by M. 



Ebelmen 246 



