INDEX TO VOLUME XIII. 



Africa, volcanic character of, 183 



Alabama, geology of, 77 



Alcohol, disinfection of, 174 



Alimentary substances, preservation of, 163 



Alkaline Chlorides 169 



Alloy of copper, zinc, and nickel, 172 



America, voicanic character of, 302 



Ammonia, in the rust of iron, 181 



Analysis of a Mineral Spring at Albany, 145 



of the Tioga Coal, 32 



of Mr. Scrope's work, on volcanos, 108 



of Olivine and Chrj'solite, 184 



Anhydrous sulphuric Acid, action of, 174 



sulphate of Soda, 185 



Answer to Mr. Quinby, 75 



Ants, battle of, 177 



Apparatus, chemical, description of, 1 



Asia, volcanic character of, 290 



Astronomical Observatory, 160 



Atmosphere, pressure of, within the cataract of Niagara, 364 



Atmospheric air, liquefaction of, 189 



B 



Bailey, E. on the use of Soapstone to diminish friction, 192 

 Barnes, D. H., his reclamation of Unios, 358 



■ on magnetic polarity, 71 



on doubtful reptiles, 66 



Barytes, action of, on Animals, 178 



Bismuth Cobalt ore, 187 



Blacking, preparation of, 163 



Blake, E. W. his reply to Mr. Qjiinby, 350 



Blowing Machines, 395 



Bone, strength of, 189 



Brome, nature of, 398 



Vol. XIII.— No. 2. 26 



