CONTENTS. - V 



Page 



Method of browning Iron , 238 



New Scientific Books 239 



New Patents 240 



NUMBER IV.— APRIL. 



Mr. Horner on the Solutions of the Function nJ/= x {concluded) 241 



Mr. Herapalh's Reply to Mr. Horner 246 



Col. Beaufoy's Astronomical Observations 247 



Sir H. Davy on the Preservation of Metals by Electro-chemical Means . . 248 



Mr. Moyle on the Temperature of Mines 259 



Mr. Moore on a simple Method of graduating glass Hydrometers 26 1 



Description of the Process of Amalgamation as carried on in Germany 



{concluded) 262 



Sir C. L. Giesecke's Account of a Mineralogical Excursion to the Coun- 

 ties of Gal way and Mayo , , 271 



On the Poison of the Toad 277 



M. Gay-Lussac on the reciprocal Decomposition of Bodies 279 



Analytical Account of the Philosophical Transactions for 1825, Part II. 



(concluded) 28 1 



Memoirs of the Astronomical Society of London, Vol. II. Part 1 282 



Spix, Avium Braziliensium Species Novae 284 



Proceedings of the Royal Society , 28g 



Royal Institution 293 



Linnean Society 294 



Astronomical Society 295 



Geological Society 300 



Vegetable Principle in Saponaria Officinalis 302 



Phosphorescence of certain Fluids 303 



On Rinmann's Green ' 303 



Formula for the Preparation of the Sulphate of Rhubarb 304 



Optical Structure of Edingtonite 304 



New Analysis of Dioptase 305 



Fossil Deer of Ireland 305 



Pecten niveus, a new Species 312 



New Instrument 313 



Preservation of x\natomical Preparations 315 



Local Attractions 315 



New Scientific Books 3 15 



New Patents 3 jg 



Mr. Howard's Meteorological Journals 31 7 



