CONTEXTS OF VOL. XVII. — FOURTH SERIES. V 



NUMBER CXIII.— MARCH. 



Page 

 Mr. J. P. HaiTison on Lunar Influence on Temperature as 



connected with Serenity of the Sky. (With a Plate.) 153 



Prof. Faraday on Regelation, and on the Conservation of Force. 162 

 Mr. A. Gages on a Method of Observation applied to the 

 study of some Metamorphic Rocks ; and on some Molecular 



Changes exhibited by the action of Acids upon them 169 



The Astronomer Royal's Remarks on Mr. Cayley's Trigonome- 

 trical Theorem, and on Professor Challis's Proof that Equa- 

 tions have as many Roots, &c 176 



Mr. W. R. Grove on the Reflexion and Inflexion of Light by 



Incandescent Surfaces 177 



Prof. Hennessy on Terrestrial Climate as influenced by the Dis- 

 tribution of Land and Water at diff'erent Geological Epochs. 181 

 Dr. Simpson on a Compound of DibromaUylammonia and Chlo- 

 ride of Mercury 1 94 



Dr. Simpson on the Action of Chloride of Acetyle on Aldehyde. 195 

 Prof. Forbes's Remarks on a paper " On Ice and Glaciers " in 



the last Number of the Philosophical Magazine 197 



Prof. ChaUis on a Mathematical Theory of Heat 202 



Mr. A. Cayley on Poinsot's four new Regular Polyhedra .... 209 

 Proceedings of the Royal Society : — 



Dr. Debus on the Action of Ammonia on Glyoxal 210 



Mr. G. B. Buckton on the Organo-metallic Radicals. ... 212 



Dr. Herapath on the Cinchona Alkaloids 218 



Dr. Gladstone and the Rev. T. P. Dale on the Influence of 



Temperature on the Refraction of Light 222 



Mr. C. Archer on the Adaptation of the Human Eye to 



varying Distances 224 



Mr. J. A. Wanklyn on some new Ethyle-compounds. . . . 225 

 Proceedings of the Geological Society : — 



Mr. G. P. Scrope on the mode of Formation of Volcanic 



Cones and Craters 229 



On the Constitution of Titaniferous Iron Ores, by Prof. Rara- 



melsberg 23 1 



On Guayaccuiite, a new Mineral Species from Chili, by Frederick 

 Field 232 



NUMBER CXIV.— APRIL. 



Dr. Miiller on the Thermal Effects of the Solar Spectrum. . . 233 



Mr. W. J. M. Rankine on the Consen-ation of Energy 250 



Mr. T. Tate on a Method of determining the Specific Gravity 



of Liquids 254 



The Rev. S. Haughton on the Felspar and Mica of the Granite 



of Canton 258 



Dr. Wallace on Hromo-arsenioui' y\( id 2G1 



