VI CONTENTS OF VOL. I. FIFTH SERIES. 



Page 

 Prof. 0. Reynolds on the Refraction of Sound by the At- 

 mosphere 324 



Proceedings of the Geological Society : — 



Prof. A. C. Rani say on the Island of Anglesey 326 



Mr. J. A. Phillips on the Greenstones of Western Corn- 

 wall 327 



The Rev. T. G. Bonney on Columnar, Fissile, and Sphe- 

 roidal Structure 328 



Mr. W. Ramsay on the influence of various substances in 



accelerating the precipitation of Clay suspended in water. 328 

 Mr. J. E. Marr on some Fossiliferous Cambrian Shales 



near Carnarvon 329 



Mr. "W. J. Harrison on the occurrence of the Rhastic Beds 



near Leicester 329 



Mr. J. D. Kendall on Haematite in the Silurians 330 



On the Spectra of Nitrogen and the Alkali -metals in Geissler 



tubes, by G. Salet 331 



On certain remarkable points in Magnets, by R. Blondlot . . 333 

 On the Metallic Reductions produced in Capillary Spaces, by 



M. Becquerel 335 



On the Chemical Actions produced by the Discharges from an 

 Induction-apparatus, by M. Becquerel 336 



NUMBER V.— MAT. 



Mr. R. Sabine on a Method of Measuring very small Intervals 

 of Time 337 



Dr. L. Bleekrode on Electromachines with Disks of Ebonite. 

 (Plate III.) 347 



Mr. F. Guthrie on Salt Solutions with Attached "Water .... 354 



Mr. R. C. Nichols on the Proof of the Second Law of Ther- 

 modynamics 369 



Mr. O. J. Lodge on some Problems connected with the Plow 

 of Electricity in a Plane 373 



Capt. C. O. Browne on the Determination of the Longitude 

 of Cairo from Greenwich by the Exchange of Telegraph- 

 Signals 390 



Prof. Challis on a Theory of Mr. Crookes's Radiometer .... 395 



Mr. R. Weber on a New Oxide of Sulphur and an analogous 

 Selenium Substitution Product of the same 398 



Notices respecting New Books : — 



Prof. W. Dittmar's Manual of Qualitative Chemical Ana- 

 lysis 409 



On the Influence of Temperature on Magnetization, by J.-M. 

 Gaugain 411 



Preliminary Note on Photographing the Least-Refracted 

 Portion of the Solar Spectrum, by Capt. W. de W. Abney. 414 



On the Occurrence of Phosphates in the Cambrian Rocks, by 

 Mr. H. Hicks 415 



