iv CONTEXTS OF VOL. X.— TOURTH SERIES. 



Page 

 Mr. R. T. Forster on the Molecular Constitution of Crystals. 



(With Two Plates.) 108 



The Rev. J. A. Galbraith on the Felspars occurring in the 



Granites of the Dublin and Wicklow Mountains 115 



Mr. R. P. Greg on two doubtful British Species, Glottalite and 



Zeuxite 118 



Prof. Poggendorff on the Ihduction Apparatus and its Effects 



(continued) 119 



Proceedings of the Royal Society 138 



On Sounding Rapid Currents, by W. Sowerby, Esq 150 



On a Fall of Meteoric Stones at Bremeworde in Hanover, by 



M. Wohler 150 



Meteorological Observations for June 1855 151 



Table 152 



NUMBER LX v.— SEPTEMBER. 



Prof. Tyndall on the Nature of the Force by which Bodies are 

 repelled from the Poles of a Magnet ; to which is prefixed, 

 an Account of some Experiments on Molecular Influences. 



(With a Plate.) 153 



Mr. A. B. Northcote on the Function of Salt in Agriculture. . 179 

 Mr. H. F. Baxter's Experimental Inquiry undertaken with the 

 view of ascertaining whether any Force is evolved during 

 Muscular Contraction analogous to the Force evolved in the 



Gymnotus and the Torpedo ... 189 



Prof. Pogoendorff on the Induction Apparatus and its Effects 



(concluded) 199 



M. J. M. Gaugain on an Electrical Apparatus which acts the 



part of a Valve 207 



M. I. Soret on the Law of Electro-chemical Equivalents .... 210 

 Notices respecting New Books: — The Rev. R. Carmichael's 

 Treatise on the Calculus of Operations; Mr. E. W. Dallas 

 on the Elements of Plane Practical Geometry, with Illustra- 

 tive Applications ; Mr. I. Todhunter's Treatise on the Differ- 

 ential Calculus, and the Elements of the Integral Calculus, 

 withnumerousExamples; and aTreatise on Analytical Statics, 

 with numerous Examples ; Mr. J. B. Phear's Elementary 

 Mechanics ; and Elementary Hydrostatics, with numerous 

 Examples ; Mr. B. Smith on Arithmetic and Algebra, in their 



Principles and Application 213 



Proceedings of the Royal Society 217 



Royal Institution 226 



On Tabasheer, by M. Guibourt 229 



Note on the Inflammability of Hydrogen, by M. Baudrimont. . 231 



Meteorological Obsers'ations for July 1855 231 



Table 232 



