VI CONTENTS OF VOL. XXII. FOURTH SERIES. 



Page 

 On the Production of the Green Matter of Leaves under the in- 

 fluence of the Electric Light, by M. Herve Mangon 327 



On the Nature of the Deposit which forms upon the copper em- 

 ployed in Reinsch's Test for Arsenic, by M. Lippert 328 



NUMBER CXLVIII.— NOVEMBER. 



Professors Kirchhoff and Bunsen on Chemical Analysis by 



Spectrum-observations — Second Memoir. (With a Plate.) . 329 

 M. Haidinger on the Phenomena attending the Fall of Me- 

 teorites on the Earth. — Part 1 349 



Mr. F. Field on the Silicates of Copper from Chile 361 



Mr. J. M. Wilson on the Readings of the Graduated Arc in 



Spectrum-Analysis, and Distortion of the Spectrum 364 



Dr. Lamont on the most advantageous Form of Magnets. (With 



a Plate.). 369 



Prof. Tyndall on Radiation and Absorption 377 



Prof. Sylvester on a Generalization of a Theorem of Cauchy on 



Arrangements 378 



Mr. C. W. Merrifield on the Hexahedron inscribed in a Sphere 382 

 Notices respecting New Books: — Mr. I. Todhunter's Ele- 

 mentary Treatise on the Theory of Equations, with a Col- 

 lection of Examples 384 



Proceedings of the Royal Society : — 



Dr. Hofmann on the Metamorphoses of Bromide of Brom- 



ethylated Triethylphosphonium 385 



Dr. Hofmann's Experiments in the Methyle- and in the 



Methylene-Series 388 



Dr. Hofmann on the Relations between the Monoatomic 



and the Polyatomic Bases 392 



Mr. A. H. Curtis on the Gyroscope 396 



Dr. J. P. Joule on the Surface-condensation of Steam . . 397 

 Dr. Matthiessen and Mr. G. C. Foster on the Chemical 

 Constitution of Narcotine and on its Products of Decom- 

 position 398 



Proceedings of the Geological Society : — 



The Rev. R. Everest on the Lines of Deepest Water around 



the British Isles 403 



Mr. J. Harley on the Ludlow Bone-bed and its Crustacean 



Remains 404 



Mr. J. Powrie on the Old Red Sandstone of Forfarshire. . 404 

 Captain Playfair on the Outburst of a Volcano near Edd.. . 405 

 Mr. C. Murray on the occurrence of an Earthquake on the 



20th of March, 1861, in Mendoza 405 



Mr. J . W. Dykes on the Increase of Land on the Coro- 



mandel Coast 405 



On a newly discovered Action of Light, by M. Niepce de St. 

 Victor 405 



