INDEX TO VOLUME XXif. 
—eoo— 
A. 
Academy of St. Petersburgh, 203. 
Acetic fermentation, 195. 
Achromatic telescopes, 358. 
Acid, chloro-chromic, 190. 
Alden, Rev. T., on descents ina diving 
bell, 325. 
Alger and Jackson, Messrs., on mineralo- 
gy and geology of Nova Scotia, 167. 
Alum clay, 37. 
Alumine, sulphate of, or soda alum of Milo, 
387. 
Analogy between the marl of New Jer- 
sey and the chalk formations of Europe, 
Dr. Morton on do., 90. 
Argillaceous slate, 33. 
Astronomical memoranda, 204. 
Chemical nomenclature of Berzelius, Prof. 
Bache on, 248. 
Chlioric ether, Samuel Guthrie on, 105. 
A. A. Hayes on, 163. 
Chteride of lime, bleaching powers of, 
304. 
Chlorine, hydrogen, carbon, conipound of, 
141. sf 
Chloro-chromic acid, 190. 
Cholera morbus, perspiration in, 366. 
Civilization, connection with mental ab- 
erration, 379. 
Coal, 41. 
Coloring materials for confectioners and 
distillers, 381. 
poisonous, 382. 
Combustion of hydrogen gas under press- 
ure, 352. 
Compost, 366. 
Audibility of sound, limits of, 374. 
Aurora borealis and disturbance of Earth’s 
Magnetism, by J. Henry, 143. 
B. 
Bache, Prof., on electro-magnetic exper- 
iments, 409. 
Bartlett, Mr., on the expansion and con- 
traction of building stones, 136. 
Bees, E. Burgess on, 164. 
Beets, red, 201. 
Berzelius, chemical nomenclature of, 248. 
Birds, destruction of, by starvation, 402. 
Bleaching power of chloride of lime, 354. 
Blowpipe, improved, 376. 
Blue coloring matter from buck-wheat, 
384. 
Bones, gelatine of, 369. 
Boron, Dr. Hare’s proceess for, 189. 
Boulders of Ohio, 300. 
Brewster, Dr., on polarization of light by 
reflexion, 277. 
Buck-wheat, blue coloring matter from, 
384. 
Buhrstone in Massachusetts, 40. 
Building stones, expansion and contrac- 
tion of, Mr. Bartlett on, 136. 
C. 
Cabinet of minerals for sale, 180. 
Campagna di Roma, malaria of, 336. 
Carbon, chlorine and hydrogen, compound 
of, 141. : 
Carpenter, G. W., on new medical prepa- 
rations, 293. 
Central Forces, Prof. Strong on, 132, 342. 
Conchology.—Mr. Lea on the Najiades, 
169. 
Conn. river, sources and course of, A. 
Smith on, 205. 
valley of, 205, 206. 
————— earthy format’s of, 209. 
—-——— alluvial sc 214. 
———. secondary dite lef 
— greenstone ‘* 224. 
section of, 227. 
Copper, 60. 
protoxide of, 353. 
Cygnus Americanus, Dr. Sharpless on, 83. 
PD: 
Datholite, locality of, 389. 
DeWitt, S., on conical rain gage, 325. 
Diluvial scratches on rocks, 166. 
Disinfecting powers of increased tempe- 
ratures, Dr. Henry on, 111 
Diving hell, descents in, Rev. T. Alden 
on, 325. 
observations by 
Dr. Mease, 327. 
Doolittle, Amos, obituary notice of, 184. 
Dye, metallic, 197. 
Dyke of greenstone in Vermont, 189. 
E. 
Earth’s magnetism, disturbance of, and 
aurora borealis, by J. Henry, 143. 
East India ferns, 191. 
Eaton’s, Prof., geological text book, new 
edition, 391. 
on trilobites, 165. 
