IV CONTENTS. 



Page 

 Mr. Donovan's Description of an Apparatus for filtering, out of Contact 



with the Atmosphere 3 15 



M. Berzelius on Fluoric Acid {continued) . . i . .<,i » J,', • i^ j, 1 16 



M. Berthier on Forge Scales 130 



Mr. Rainy on the Specific Gravity of Hydrogen Gas 1 35 



Analytical Account of An Attempt to establish the First Principles of 



Chemistry by Experiment j by Dr. Thomson 1 38 



Proceedings of the Linnean Society ]48 



■ Geological Society 1 49 



Queries respecting Animal Magnetism 151 



Anatomical Difference between Helix Hortensis and H. Nemoralis. ..... 152 



On Siren Lacertina 1 52 



On the Animal of Argonauta 1 52 



On the Animal of Calyptraea 1 53 



On the Genus Plagiostoma 153 



On Fossil Elks I5S 



Fossil Crocodile from Whitby 154 



Letter from Mrl Herapath 154 



Luminous Snow Storm on Lochawe » 154 



Process for rendering impervious to Water and Air all Kinds of Cloths; [^ 



also Leather and Paper, &c 155 



New Scientific Books 1 56 



New Patents 156 



Mr. Howard's Meteorological Journal I5c) 



NUMBER IIL— SEPTEMBER. 



M 

 Col. Beaufoy on Naval Improvement 161 



Mr. Nixon^s Explanation of the Theory of the Barometrical Measurement 



of Heights (concluded) 164 



M. Berzelius on Hydracids. , , 1 80 



Dr. Carver on a Meteoric Stone which fell at Nanjemoy 1 86 



Col. Beaufoy's Astronomical Observations. 188 



Drs. Chtisiison and Turner on the Con^parative Advantages of Oil and 



Coal Gas I90 



Mr. Gray's Synopsis of the Genera of Reptiles and Amphibia, with a 



Description of some new Species , I03 



Mr. Mill on the Influence of the Moon on Animal and Vegetable Eco- 

 nomy 218 



Analytical Account of the Philosophical Transactions for 1824, Part II. 



(concluded) '220 



Proceedings of the Geological Society 229 



Formation of Ammonia 230 



Sulphato-tri-carbonatc of Lead 232 



Hydrate of Magnesia. .'.•.. 23!2 



Magnesite ..:... ..•.•.•..-.•... 233 



