CONTENTS OF VOL. XXVI. — THIRD SERIES. V 



Page 



Dr. H. B. Jones on the Decomposition of Salts of Ammonia at 



ordinary Temperatures 234 



Mr. Hopkins on the Mechanism of Glacial Motion. Third 



Letter 237 



Proceedings of the Royal Society 251 



■ Royal Astronomical Society 256 



Geological Society 261 



Notices respecting New Books 263 



Atmospheric Phsenomena seen at High Field House, Notting- 

 hamshire, on the 20th and 21st of October 1844, by E. J. 



Lowe, Esq 264 



Distillation of Butyrate of Lime, by M. G. Chancel 267 



Potash and Oxide of Chromium, by M. Fremy 268 



Perchloride of Chromium, by M. Wohler 269 



Double Chloride of Potassium and Chromium 269 



On Hemipinic Acid, by M. Wohler 270 



New Comet 271 



Meteorological Observations for January 1845 271 



Table 272 



NUMBER CLXXIII. -APRIL. 



Prof. L. Pilla on the True Geological Position of the Macigno 

 Formation in Italy and in the South of Europe 273 



M. Peltier on the Changes produced in Metallic Wires which 

 have served a long time as Electric Conductors 278 



Mr. J. G. Galle's Measurements of the Rainbow 279 



Prof. Leymerie's Observations on a Communication made by 

 Dr. Fitton to the Geological Society of France at the Meet- 

 ing of Mav 20, 1844, on the Lower Greensand of the Isle 

 of Wight ' 281 



The Rev. M. O'Brien on the Laws of Reflexion and Refraction 

 at the Surfaces of Substances of High Refracting and Ab- 

 sorbing Powers, such as Metals 287 



Mr. E. G. Schweitzer's Analysis of the Bonnington Water, near 

 Leith, Scotland 297 



Mr. S. M. Drach on Observation-Hours convenient to Ama- 

 teur Meteorologists, and adequate for obtaining Mean Values 314 



Mr. Graves on a Connection between the General Theory of 

 Normal Couples and the Theory of Complete Quadratic 

 Functions of Two Variables 315 



Prof. Matteucci's Account of a new Experiment in Electro-sta- 

 tical Induction 320 



Dr. R, D. Thomson on the Digestion of Vegetable Albumen, 

 Fat and Starch 322 



