604 



INDEX 



Abraham, (Mr.) his mode of correcting the ma^etism of watch- 

 works, 223 

 Acids, new, obtained from animal substances by alkahes, 239 

 Acid, hydrocyanic, on the detection of, in animal bodies, 480 

 Achromatic microscopes, with a description of certain objects for 



trying their defining and penetrating power, 410 

 Action of nitric acid on hogs'-lard, 489 

 Aerolites, ancient notice of, 502 



Agriculture, on the introduction of salt as an agent in, 337 

 Ainger, (Mr. A.) on the principle of security in the various kinds 



of locks, 212 — remarks on suspension-bridges, 456 

 Air, heat evolved from, by compression, 228 

 Alcock, (Mr.) his account of the extensive application of the chlo- 



rurets of lime and soda as disinfecting agents, 211 

 Alcohol, method of destroying the empyreumatic odour of, 239 

 Ammonia, presence of, in the material oxide of iron, 481 — muriate 



of, volcanic, 481 

 Ammonia and mercury, nitrate of, 482 

 Animal substances, new acids obtained from, by the action of 



alkalies, 239 

 Ancient glass-bottles, notice of, 500 

 Arago, (M.) remarks by, on the change of inclination in the 



dipping-needle, 124 — on the electro-conducting power of metals, 



470 

 Architecture of the metropolis, remarks on, 352 

 Arcs perpendicular to the meridian which are now measuring on 



the continent of Europe, account of, 177 

 Arrangement, natural botanical dependant on chemical characters, 



498 

 Arsenic, preparation of the chloride of, 234 

 Asbestus, crystallization of, 241 

 Assamese poison, notice of, 211 

 Astronomical and nautical collections, 122, 434 

 Atlas Ethnographique du Globe, analysis of, 393 

 Atmospheric phenomena, 242 



Atwater, (Mr.) on atmospheric phenomena at Ohio, U.S., 242 

 Aurora Borealis, its influence on the magnetic-needle, 229 



