vi CONTENTS OK VOL. 1. FOUIiTH SERIES. 



Page 



Dr. Tyndall on the Phenomena of a Water- Jet 105 



Dr. Anderson's Description and Analysis of Gurolite, a new 



Mineral Species HI 



Dr. A. von Planta on the Constitution of Bebeerine 114 



Mr. J. J. Sylvester's Enumeration of the Contacts of Lines 



and Surfaces of the Second Order 119 



Mr. J. Glaisher on the Meteorology of England and the South 



of Scotland during the Quarter ending December 31, 1S50 . . 141 

 Prof. Stokes on the alleged necessity for a new General Equa- 

 tion in Hydrodj'namics 157 



Mineralogical Notices 160 



Prof. Page on Electro-Magnetism as a Moving Power 161 



Proceedings of the Royal Society 167 



Geographical Society of France 169 



Singular property and extraordinary size and length of the Se- 

 condary Spark, by Prof. Chas. G. Page, M.D 170 



On the equivalent of Magnesium, by MM. R. F. Marchand and 



Th. Scheerer 170 



On a series of Alkaloids homologous with Ammonia-Methyl- 



amine, by M. A. Wurtz 171 



On Caproic and ffinanthylic Acids, by Messrs. Brazier and Goss- 



leth 173 



Meteorological Observations for December 1850 175 



Table . 176 



NUMBER III.— MARCH. 



Prof. Thomson on the Theory of Magnetic Induction in Ciy- 



stalline and Non-crystalline Substances 177 



Prof. Donkin on the Geometrical Theory of Rotation 187 



Mr. A. J. Robertson on the Negative Wave of Translation . . 192 

 Dr. Tyndall's Reports on the Progress of the Physical Sciences : 



— Recent Researches on Electro-magnetism 194 



Prof. Potter on Hydrodynamics 205 



Dr. A. von Planta and Mr. W. Wallace on Apiine 212 



Mr. W. J. M. Rankine on Laplace's Theory of Sound 225 



Mr. S. M. Drach's Deductions from Mr. Glaisher's " Meteoro- 

 logical Corrections " 227 



Prof. ChaUis on the Principles of Hydrodynamics : with a Reply 



to the Arguments of Professor Stokes {continued) 231 



Mineralogical Notices 242 



Proceedings of the Royal Society 243 



Postscript to a paper " On Striated Rocks in the Lake District 



of Westmoreland," by James Bryce, Jun.,M. A., F.G.S. .. 256 

 On some Properties of Boracic Acid, and Estimation of its Quan- 

 tity, by Prof. H. Rose 257 



Phosphorescence of Chalk Lines, by James Napier 260 



Analysis of two samples of South Australian Gold, by Andrew 



D. Thomas, Esq 261 



