GENERAL INDEX. 



PAGE 



jEther, luminous, hypothesis relating 



to, 122 



Africa, expedition into the interior of, 394 

 " expedition into Eastern, 394 



AGASSIZ, PROF., 271 



Agricultural machines, 84 



Air, use of, for the purpose of convey- 

 ing mechanical power, 82 

 Alabama, natural bridge in, 281 

 ALEXANDER, M., 86 

 Aliments, nature of, 222 

 Alum, improvements in the manufac- 

 ture of, 194 

 Ammonia, assumed existence in the 



general atmosphere, 234 



Amphitypes, 133 



Anaesthetic action, 205 



Analyzer, new elliptic, 135 



Ancient remains of man found in 



Ohio, 360 



Angles of crystals and other substan- 

 ces, improved method of measuring, 147 

 Animals, distribution of in California, 355 

 Anticlinal axes, passage of into faults, 245 

 Antiquity of repeating fire-arms, 55 



Apothecaries' Hall, first public, 230 



Ararat, Mt., ascent of, 279 



Arctic climate, 392 



Arsenious acid, changes of structure 



observed to take place in, 171 



Arsenic and antimonial spots, some dis- 

 tinguishing reactions of, 214 

 Arsenic-eaters of Austria, 362 

 Arsenic in plants, 215 

 Asia, Central, geography of, 251 

 Astronomical observations, Professor 



Mitchel's system, 386 



Atmosphere, height of, 160 



moisture in, new method 

 of determining, 234 



Atomic volumes, observations on, 167 



Aurora, effect of upon the weather, 387 

 Aurora of September, 1851, 387 



Axles, railway, improvements in, 27 



AYRES, MR., 343 



Azoic system, the, 253 



PAGE 



Babylon, curious relics from, 395 



BACHE, PROF. A. D., 153 



BACHELDER, MR. J. M., 109 



BAILEY, PROF. J. W., 211 



Barometer, alarm, 159 



" Bourdon's improved, 159 



" gigantic, 14 



Bats, structure of the spinal cord in, 350 

 Beads, Bailey's, 384 



BEAUMONT, M. E. DE, 244 



Bird, fossil bones and eggs of a, found 



in Bladagascar, 318 



BLAKE, MR. W. P., 291, 292 



Blood, transfusion of, 367 



Bodies, consideration of the probabil- 

 ity that some, so-called elementary, 

 may be decomposed, 167 



BOGARDUS, MR., 39 



Bohemia, silurian system of, 255 



Boilers, incrustations, 50 



Bourdon's improvements in gauges, 



&c., 159 



Brass, malleable, 180 



Brick, new machine, 71 



Bridge, railroad, gigantic in Germany, 35 

 " and viaduct over the Wye, 35 

 Wheeling suspension, 36 



Bromhydric ether, 205 



Broom-corn, machine'to cut and assort, 85 

 Building for the Great Exhibition, 3 



Building for the Great Exhibition, com- 

 pletion and opening of, 8 

 Building for the Great Exhibition, dec- 

 orations of, 7 

 Building for the Great Exhibition, gen- 

 eral appearance of, 



Buildings, horticultural, Paxton's im- 

 provements in, 2 

 BUNCE, MR. J. B., 217 

 BURDICK, JASON, 74 

 BURNETT, DR. W. I., 351, 352, 370 

 Butter, modifications of the method of 



preparing, 221 



Calico, new method of contracting the 



fibres of, 187 



California, distribution of animals in, 355 



