INDEX. 
A 
Abbot, J. H., Description of some 
new electro-magnetic, and mag- 
neto-electric instruments and ex- 
periments, xl, 104.f 
, theory of the pneumatic par- 
adox, xxxix, 296f; xl, 144.f 
Aberration of the fixed stars, F. 
Struve, xlvii, 91. 
Absorption in animals, mechanism 
of, F. Magendie, ii, 288. 
Academy of Sciences of Philadel- 
phia, history of, xlvil, 6. 
399 ; xix, 88, 355; xxi, 183. 
, Journal of, when 
commenced, xix, 91. 
, notice of the Cat- 
alogue of the Library, xxxiui, 181. 
, Dr. Burrough’s 
collections, xix, 355. 
, McClure’s dona- 
tion to, xxx, 187. 
, notice of Journal 
or Proceedings of, xx, 414; xxxix, 
395; xlix, 183. 
——, Maryland, of Science and 
Literature, xxx, 192, 395; xxxi, 
395; xxxil, 204. 
, Delaware, of Natural Scien- 
ces, xxiv, 177. 
, St. Petersburgh, of Sciences, 
xx, 889; xxu, 208. 
, stockholm, of Sciences, iv, 
387. 
Acarus, Crosse’s, xxxii, 374£; xxxv, 
HQ5': xlix eons 
, experiments of W.H. Weekes, 
xlili, 395. 
1 
, notice of, viil,| 
A Cit 
Acarus, the supposed microscopic 
fungus, xliii, 205.f 
Acetic acid, a new process for 
obtaining from alcohol, xxviii, 
308. 
, on crystallizable, C. 
Despretz, xxvii, 197. 
Achromatic microscope, improve- 
ments in, E. Thomas, xx, 265.f 
Acid, acetic, new process for, from 
alcohol, xxvill, 358. 
‘ , on crystallizable, C. 
Despretz, xxvii, 19'7. 
, angelicic, xlvii, 196. 
, apocrenic, Berzelius, xxviil, 
121. 
, argento-cyanic, xvill, 304. 
, aspartic, xvil, 173. 
——., benzoic, xlix, 194. 
, of butter, volatile, J. U. Lezch, 
xlix, 202. 
, boracic, of Tuscany, i, 349 ; 
xxvill, 143; xxxvil, 270. 
; , in the waters of Vul- 
cano, ll, 349. 
, butyric, xlviii, 186. 
, carbonic, see carbonic acid. 
, chlorovinic, A. A. Hayes, 
xxii, 142. 
, chlorovinous, xxi, 142. 
, citric, from gooseberries, xvi, 
385. 
, citricic, S. Baup, xxxiv, 206. 
, columbic, A. A. Hayes, xlvi, 
166. 
, crenic,J. Berzelius,xxviii,121. 
, cyanic, xvi, 258. 
, formic, see formic acid. 
