Vi CONTENTS. 



Page 



Proceedings at the Friday-Evening Meetings of the Royal 



Institution of Great Britain • • 299 



On the Probability that the Incrustations from which Mr. White 

 has inferred that the Cement of Waterloo Bridge is ill- 

 compounded, are in reality stalactites 301 



New Lamp • • ■ 303 



On the Detection of the Traces of Writmg fradulently erased— 



M. Soubeiran on the Combinations of Chlorine 304- 



Hv-drochloride of Carbon; Chloric iEther— On the Decom- 

 position of Alcohol, by Chlorine 305 



On Hydruret of Sulphur 306 



Analysis of Maillechort — Trial of Chronometers at Greenwich 



in 1831 307 



On the " Double Water-Screw" of the " Century of Inven- 

 tions" 308 



New Scientific Books 309 



Obituary 310 



Dr. Burney's Results of a Meteorological Journal for the Year 

 1831, kept at the Observatory of the Royal Academy, Gos- 



port, Hants 311 



New Patents • 316 



Occultations of Planets and fixed Stars by the Moon, in 

 April 1832. Computed for Greenwich, by T. Henderson, 

 Esq.; and circulated by the Astronomical Society — Me- 

 teorological Observations 318 



NUMBER LXV.— MAY, 



Mr. W. Marshall's Account of the Russian Method of ren- 

 dering Platinum malleable 321 



Mr. W. Sturgeon on the Distribution and Retention of Mag- 

 netic Polarity in Metallic Bodies 324; 



Prof. Encke's Derivation of Monge's Formulse for the Trans- 

 formation of Coordinates in Space 329 



Mr. J. White's Papers relating to a Design for the New Lon- 

 don Bridge, on the Principle of Cementitious Architecture 333 



Rev. G. Phillips on the Summation of Series {continued) .... 339 



Mr. R. W. Fox on some Phaenomena of Heat 345 



Dr. T. Thomson's Chemical Analysis of the Blood of Cholera 

 Patients 347 



On the Formulae for expressing the relative Importance of the 

 Boroughs 358 



Mr, J. D. Forbes on the obtaining of an Electric Spark from a 



Natural Magnet 359 



Dr. 



