IV CONTENTS OF VOL. XXIX. — THIRD SERIES. 



Page 

 Mr. H. S. Warner on Conjugate Points in relation to Prof. 

 Young's paper on this subject, Philosophical Magazine for 



August 1845 83 



Mr. H. S. Warner on the Connexion of the Circle and Hyper- 

 bola ; and on the Geometrical Interpretation of Imaginary 



Exponentials 88 



Mr. J. Napier on the unequal Decomposition of Electrolytes, 



and the Theory of Electrolysis 92 



Prof. Bunsen on a convenient Instrument for gi'aduating Glass 



Tubes 99 



Mr. G. S. Cundell on the Gallo-Nitrate of Silver of Mr. Fox 



Talbot, and its Action upon Iodized Paper 101 



Dr. A. Waller's Microscopic Observations on Hail 103 



Mr. H. Meikle on the Theory of Parallel Lines 112 



Sir W. R. Hamilton on Quaternions ; or on a New System of 



Imaginaries in Algebra 113 



Dr. C. F. Schcenbein on the Influence exerted by Electricity, 

 Platinum and Silver upon the Luminosity of Phosphorus. . . . 122 



M. G. L. Ulex on Struvite, a new Mineral 124 



Proceedings of the Royal Society 128 



Royal Astronomical Society 133 



On an Improved Method of Detecting Alumina, by Mr. J. C. 



Nesbitt 145 



On a new Substance from Cochineal 145 



Sulphurous ./Ether 146 



On the Preparation and Properties of Digitoleic Acid and its Salts 147 

 On a remarkable Felsite from Marienberg, by A. Breithaupt. . 148 



Chemical Analysis of Copper Blende, by C. F. Plattner 149 



Loxoclase (Felsites loxoclasius), a new member of the Felsite 



genus, by A. Breithaupt 150 



Meteorological Observations for June 1846 151 



1 Table 152 



NUMBER CXCIII.— SEPTEMBER. 



Dr. Faraday on the Magnetic Affection of Light, and on the 

 Distinction between the Ferromagnetic and Diamagnetic 



Conditions of Matter 153 



Dr. A. W. Williamson on the Blue Compounds of Cyanogen 



and Iron 156 



On the Symbol V — 1 in Geometry 171 



Prof. J. R. Young's note on Mr. Warner's Paper on Conjugate 



Points 175 



Prof. E. Wartmann on two Extraordinary Meteors 176 



Mr. G. Rainey on the Cause of Endosmose and Exosmose. ... 179 

 Mr. J. Cockle on some Formula; which serve to indicate the 

 limits of the application of Indeterminate Methods to the 

 solution of certain Problems 181 



