ly 



CONTENTS OF THE VOLUME, 



HISCELLANEOUS ARTICLE^. 



I. Mechanical Science. 



Page 

 1 Micrometrlcal Measurement of Sa- 

 turn and of Jupiter and its Sa- 

 tellites 220 



J2 Diamond Microscope 221 



3 Results of Observations on Falling 



Stars 222 



4 Experiments on the Resistance of 



variousBodies to Rupture caused 

 by Longitudinal Tension .... 223 



5 Magnetism of Watch-works cor- 



rected 223 



Page 



6 Peculiar Construction of Shot- 



cartridges 224 



7 Elastic Mould for Castings. ... 225 



8 Leslie's Apparatus for ascertaining 



the Specific Gravity of Powders 226 



9 Menstruum for Biting-in on 



Plates of soft Steel ib. 



10 Etching on Steel ib. 



1 1 Method of Cutting Glass 227 



12 Preservation of Skins ib, 



13 Indian Method of Varnishing. . j6. 



II. Chemical Science. 



1 Heat evolved from Air by Com- 



pression 228 



2 On the Action of a Moving Me- 



tallic Disc, upon a portion of a 

 Voltaic Conductor , ib. 



3 Influence of the Aurora Borealis 



on the Magnetic Needle 229 



4 Electro-chemical Appearances ib. 



5 Earthy Depositions from Water 



influenced by the Electricity of 

 Metals in contact 230 



6 Instance of a returning Stroke 



by Lightning ib, 



7 Phosphorescence of Fluate of 



Lime 232 



8 Chemical Compounds produced 



by physical Powers ib. 



9 Table of the Density of Vapours 



and Gases ib. 



10 On the Existence and Nature of 



Bromine • 233 



11 Preparation of Chloride of Bo- 



ron 234 



12 Chloride of Boron , ib. 



13 Preparation of Chloride of Arse- 



nic 234 



14 Preparation of Oxyde of Chrome, 



as a Figment • 235 



15 Separation of Iron from Manga- 



nese ib. 



16 Pure Proto-Salt of Iron 236 



17 Action of Potassium on Oxalates ib. 



18 Analysis of the Triple Prussiate of 



Potash ib, 



19 Preparation of Medicinal Chlo- 



ride of Soda ib» 



20 Mode of Action of Disinfecting 



Chlorides 237 



21 Deleterious Eff"ects of Carbonic 



Gas 238 



22 New Acids obtained from Animal 



Substances by Alkalies .... 239 



23 Sugar of Melons ib» 



24 Method of Destroying the Empy- 



reumatic Odour of Alcohol . . ib,, 

 55 On the Colouring Matter of the 



Madder. ib. 



III. Natural History. 



1 Subterraneous Noises heard at 



Nakous 240 



2 Italian Cavern containing Bones 241 



3 Crystallization of Asbestus .... ib. 



4 Dense Fogs ib. 



5 Atmospheric Phenomenon 242 



6 Effects of Cold ib. 



7 Notice of Mr. Burchell's Travels 



in South America • ib. 



8 Note on the Motions and Actions 



of Quadrupeds ,.....,...,, 243 



9 Measurements and Weight of a 



Sea-gull 244 



10 Excision of Teeth ib. 



1 1 Poisoned Wounds 245 



12 Bites of venomous Reptiles, , , • 246 



13 Poison of Rattlesnakes ib, 



14 On Two new Kinds of Urinary 



G ravel ib, 



15 Conquest of Peru and Mexico, 



by the Mongols, in the Thir- 

 teenth Century .......... 247 



Meteorological t)iARY «••«•••• 248 



