IV CONTENTS OF VOL. XXXVII.— THIRD SERIES. 



Page 

 Dr. Faraday's ExperimentalResearches inElectricity. — Twenty- 

 third Series : — On the polar or other condition of diamagnetic 



bodies 88 



Mr. W. Spottiswoode on the Geometrical Interpretation of Qua- 

 ternions 108 



Mr. J. Buekman on the Structure and Arrangement of the Tes- 

 serae in a Roman pavement discovered at Cirencester in 



August 1849 119 



Prof. W. Thomson on the Effect of Pressure in Lowering the 



Freezing-Point of Water experimentally demonstrated .... 123 

 Mr. J. P. Joule on a remarkable appearance of Lightning .... 127 

 Mr. J. Glaisher's Remarks on the Weather during the Quarter 



ending June 30, 1850 : . . . , 129 



Notices respecting New Books : — Dr. Anderson's Course of 



Creation 145 



Proceedings of the Cambridge Philosophical Society 146 



Chemical Examination of a Mineral containing Oxide of Ura- 

 nium, from the north shore of Lake Superior, by J. D.Whitney 153 



On the Dust-Storms of India, by P. Baddeley, Esq 155 



On certain phenomena of forced Dilatation of Liquids, by M. 



Marcellin Berthelot „ 158 



Meteorological Observations for June 1850 159 



_. Table. 160 



NUMBER CCXLIX.— SEPTEMBER. 



Dr. Percy on the Composition of Beudantite 161 



The Rev. T. P. Kirkman on the Triads made with Fifteen 



Things 169 



Mr. D. Campbell on the Action of the Soap-Test upon Water 

 containing a Salt of Magnesia only, and likewise upon Water 



containing a Salt of Magnesia and a Salt of Lime , . 171 



Mr. J. Middleton on an Accelerating Process in Photography 178 



Mr. R. Crossley on Algerite, a new Mineral Species. e ....... . 179 



Prof. Graham on the Diffusion of Liquids 181 



Mr. T. S. Davies on Geometry and Geometers. No. VI 198 



Mr. J. J. Sylvester on an Instantaneous Demonstration of Pas- 

 cal's Theorem by the method of Indeterminate Coordinates 212 

 Mr. J. J. Sylvester on a new Class of Theorems in elimination 



between Quadratic Functions 213 



Proceedings of the Royal Society 219 



Cambridge Philosophical Society 230 



On the Compounds of Iodine and Phosphorus, by M. B. Coren- 



wiuder 234 



Description of some new Minerals from Norway, by M. P. H. 



Weibye 234 



On the Hyposklerite of Arendal, by M. C. Rammelsberg .... 237 



