CONTENTS. V 



Page 



Agave Americanum. By the Same 233 



Crystallization of Platina. By G. B. Sowerby, Esq 233 



Meteorite. By G. B. Sowerby, Esq 234 



Temperature of Taroslawl, Russia 234 



New Scientific Books 234 



New Patents 235 



Col. Beaufoy's Magnetical and Meteorological Observations for July 236 



Mr. Howard's Meteorological Journal for July 239 



NUMBER XCIV.— OCTOBER. 



On the Specific Gravity of Gases. By Thomas Thomson, M.D. F.R.S. 



(concluded) 241 



A Mode suggested for passing Calculi from the Bladder by the Aid of 



Atmospheric Pressure 208 



On Bonaparte's Fly Bridge at Antwerp. By Robert Stevenson, Civil 



Engineer. (With a Plate.) 269 



Expeviments on the Effect of a Current of Electricity on the Magnetic 



Needle. By Prof. Oersted 273 



Observations on the late Solar Eclipse. By Col. Beaufoy, F.R.S 277 



On the Climate of New South Wales. By Mr. James Trimmer 278 



On the Direct Method of Finite Differences. By Mr. James Adams 281 



On the Atomic Theory. By Dr. Macncven {continued) 289 



Analytical and Critical Account of An Essay on Magnetic Attractions. 



By Peter Barlow, of the Royal Military Academy 294 



Yeast as a Manure 307 



Yeast 307 



Colouring Matter of the Cancer Astacus 308 



Crystallization of Balsam of Copaiva 308 



Meteoric Stone 308 



Calomel 309 



Karpholite. By G. B. Sowerby, Esq 310 



On the Bed of the German Ocean 311 



Account of the late Solar Eclipse. By L. Howard, Esq 313 



Surrey Institution 314 



New Scientific Books 314 



New Patents 315 



Col. Beaufoy's Astronomical, Magnetical, and Meteorological Observa- 

 tions, for August 3 16 



Mr. Howard's Meteorological Journal for August 319 



