JV CONTENTS OF VOL. VI. FOURTH SERIES. 



Page 

 Mr. A. Cayley on the Harmonic Relation of two Lines or two 



Points. ." 105 



Prof. Stokes on the Cause of the Occurrence of Abnormal 



Figures in Photographic Impressions of Polarized Rings. . . . 107 

 Prof. Thomson on the Mutual Attraction or Repulsion between 



two Electrified Spherical Conductors 114 



Prof. Chapman's Mineralogical Notes : — Second Series 115 



Dr. Tyndall on Molecular Influences. — Part I. Transmission 



of Heat through Organic Structures 121 



Mr. J. J. Sylvester on the new Rule for finding Superior and 



Inferior Limits to the real Roots of any Algebraical Equation 138 



Proceedings of the Royal Society 140 



— — Royal Institution 150 



On the Condensation of Gases at the surface of Solid Bodies, 



by MM. J. Jamin and A. Bertrand 156 



Meteorological Observations for June 1853 159 



Table 160 



NUMBER XXXVIII.— SEPTEMBER. 



Prof. Potter on the Fourth Law of the Relations of the Elastic 



Force, Density, and Temperature of Gases 161 



Dr. Herapath on the Discovery of Quinine and Quinidine in 

 the Urine of Patients under Medical treatment with the 



Salts of these mixed Alkaloids (With a Plate.) 171 



Prof. Chapman on the Classification of Minerals . 175 



Mr. A. Cayley on a Theorem for the Development of a Factorial. 182 

 Mr. A. Cayley's Note on a Generalization of the Binomial 



Theorem 185 



Mr. T. J. Herapath on a quick Approximative Method of Esti- 

 mating Minute Quantities of Iodine 185 



Dr. Schunck on the Constitution of the Colouring Matters of 



Madder , 187 



Mr. T. T. Wilkinson on Mathematics and Mathematicians. — 



The Journals of the late Reuben Burrow (continued) 196 



Prof. Williamson's Note on the Preparation of Propionic and 



Caproic Acids 204 



M. A. Delesse's Researches on Granite 206 



Mr. J. J. Sylvester's Note on the New Rule of Limits 210 



Mr. J. J. Sylvester on the Algebraical Theory of the Secular- 

 inequality Determinantive Equation 214 



Proceedings of the Royal Society 217 



Royal Institution 23 1 



On the Influence of the Earth's Rotation on the Motion of 



a Conical Pendulum, by M. A. Bravais 234 



Examination of a red variety of Molybdate of Lead from Phoenix- 

 ville, U.S., by Charles M. Wetherill, Ph.D 236 



