CONTENTS. V 



Page 

 M. Berzeliuson the Combinations of Acetic Acid withPeroxide of Copper 188 



Dr. Thomson's Reply to M. Vauquelin ' 203 



Rev. J. B. Emmett on an Anomaly in the Combination of Potassium and 



Oxygen 205 



Capt. Beaufoy's Observations made during his Aerial Excursion £09 



On the Improved Goniometer of M. Adelmann. (With a Plate.) 212 



Remarks upon Mr. Dauiell's Work on Hygrometry 215 



M. Gay-Lussac on the Assay of Chloride of Lime. (With a Plate.) 218 



Corrections in the last Number of the Annals 226 



Proceedings of the Royal Academy of Sciences of Paris 227 



Means of detecting the Presence of Acetate of Morphia 228 



Cause of the Odour of Hydrogen Gas 229 



Selenium, an Attendant of Sulphur 230 



A Superb Collection of Minerals for Sale 231 



New Locality of Tellurium 231 



Hydrophobia cured by Acetate of Lead 632 



Extraordinary Tide 234 



Unequal Distribution of Heat in the Prismatic Spectrum 235 



Distinction of Positive and Negative Electricity 236 



Description of two Surfaces composed of Siliceous Filaments incapable of 



reflecting Light, &:c 230 



New Scientific Books 237 



New Patents 238 



Mr. Howard's Meteorological Journal 239 



NUMBER IV.— OCTOBER. 



M. Levy on a New Mineral Substance 241 



Mr. Haycraft on the Heat produced by firing Gunpowder 245 



Dr. Thomson on Subphosphuretted Hydrogen Gas 247 



Mr. South's Corrections in Right Ascension of 37 Principal Stars 248 



Rev. J. B. Emmett on the Expansion of Liquids 254 



Mr. Patten on a New Air Pump. (With a Plate.) 255 



Mr. Daniell's Reply to X 257 



M. Bussy on the Sulphuric Acid of Saxony 259 



Col. Beaufoy on the Construction of Vessels 264 



M. Brcant's Process for making Damasked Steel 267 



Mr. llcrsehel on certain Motions produced in Fluid Conductors when 



transmitting the Electric Current (concluded) 271 



Mr. Whipple on Nitric Ether 286 



Col. Beaufoy's Astronomical Observations 286 



Mr. Powell's Remarks on Solar Light and Heat (continued) 287 



Dr. Wollaston <>n Semidecussation of the Optic Nerves 294 



Dr. Henry's Analysis of some of the Aeriform Compounds of Nitrogen .. H99 



Ignition supported by Ilydrophosphoric Gas 304 



Effect of Prussic Acid on Vegetation 304 



