CONTENTS. V 



Page 



Rev. J. Challis on the Theory of the Compressibihty of the 

 Matter composing the Nucleus of the Earth, as confirmed by 



what is known of the Ellipticities of the Planets 200 



Mr. R. Phillips's Analysis of some Salts of Mercury 205 



Mr. J. Prideaux's Experiments on Vanadiate of Ammonia, and 



on some other Compounds of Vanadium 209 



New Books:— Dr.Paris'sLifeofSirHumphryDavy {continued) 214< 



Proceedings of the Royal Society 223 



Zoological Society 229 



Mr. A. Connell's Preparation of Iodic Acid 235 



New Scientific Books' 236 



Mr. Saull's Geological Museum — Occultations of Planets and 

 fixed Stars by the Moon, in September 1831. Computed 

 for Greenwich, by T. Henderson, Esq. ; and circulated by 



the Astronomical Society 237 



Meteorological Observations 238 



NUMBER LVIIL- OCTOBER. 



Mons. L. Elie de Beaumont's Researches on some of the Revo- 

 lutions which have taken place on the Surface of the Globe; 

 presenting various Examples of the Coincidence between 

 the Elevation of Beds in certain Systems of Mountains, and 

 the sudden Changes which have produced the Lines of De- 

 marcation observable in certain Stages of the Sedimentary 

 Deposits 241 



Mr. J. Blackwall on an undescribed Bird of the Y araWy Falconidte 264- 



Mr. H. J. Brooke on Monticellite, a new Species of Mineral; on 

 the Characters of ZoraVe; and on Cupreous Sulphate of Lead 265 



Mr. J. F. Daniel] on a New Register- Pyrometer, for Measuring 

 the Expansions of Solids, and determining the higher De- 

 grees of Temperature upon the common Thermometric 

 Scale (continued) 268 



Prof. Encke on the Calculation of the Orbits of Double Stars 

 [continued) 279 



Mr. J. Nixon's New Method of Levelling the Axis of a Transit 

 Instrument 284? 



New Books : — Young's Elementary Treatise on the Diflerential 

 Calculus 287 



Proceedings of the Royal Society 293 



Zoological Society 302 



M. Rouclias's Red Colouring Matter produced by the Action 

 of Nitric Acid upon Alcohol, &c 313 



Perchloric Acid— Red Solutions of Manganese — Powerful 



Electro-Magnet. . . t „ . . 314' 



Marking- 



