BAC 
Auroral arch of May, 1836, height 
of, A. C. Twining, xxxii, 224. 
in Vermont, Sept., 18388, 
J. Dean, xxxv, 380. 
belt of May, 1840, B. C. 
Herrick, xxxix, 194, 383. 
Aurum Millium, a new metal, 11, 363. 
Auscultation, 111, 375. 
Australia, minerals of, F. Alger, 
xxxix, 157. 
Australian Boomerang, or Kilee, 
notice of, xxxvi, 164.f 
Autumnal coloration of leaves, Ma- 
caire Prinsep’s view of, xvi, 215. 
Automolite, locality in Connecticut, 
xii, 156. 
5 , New Jersey, v, 402. 
Aventurine feldspar, M. Scheerer, 
xlix, 394. 
Avogadro, elastic force of the va- 
por of mercury, xxiv, 286. 
Axinite in Canada, vill, 62. 
Azote, see Nitrogen. 
B. 
Babbage, C., on the decline of sci- 
ence in England, xx, 164. 
, fees of admission to learned 
societies of Britain, xx, 165. 
, list of men of science who 
have held offices under govern- 
ments, xx, 172. 
, number of members of some 
societies, xx, 173. 
, calculating machine and con- 
stants of, xxviil, 64. 
, analytical engine of, xlvi, 205. 
Babel, tower of, xxxvil, 352. 
Bache, A. D., safety apparatus ‘for 
steamboats, xx, 317.! 
, disturbance of the needle 
during the aurora borealis, xxvii, 
113.f 
, on the meteors of Noy. 18, 
1833 and 1834, xxix, 383. 
, Influence of color on radia- 
tion, xxx, 16. 
, radiation and absorption of; 
heat, specific heat, and apparatus 
for illustrating, xxviii, 820.f 
22 
BAT 
Bache, A. D., corresponding mag- 
netic observations by, along with 
Prof. Lloyd of Dublin, xli, 210. 
, effect of deflected current of 
air, on the results with a rain 
guage, xxxv, 287. 
, Appointed to the coast survey, 
xlvi, 2138. 
Bachman, J., on, the migration of 
the birds of North America, xxx, 
81. 
Bacon, Lord, some notice of, C. 
Fox, xxxvi, 220. 
Baddely, F. H., on the red color 
of the flame from strontian, xvill, 
261. 
, a new instrument for taking 
specific gravities, xviii, 263.f 
, on the sulphate of strontian 
of Kingston, U. C., and on the 
geology of the vicinity, xviil, 
104. 
, buoyancy of boulders at great 
depths, xxvii, 111. 
—— , gold in Lower Canada, xxviii, 
12: 
, water limerock of Quebec, 
xxvill, 113. 
, cement of the Castle Rock, 
Quebec, xxvill, 368. 
Baily’s method of determining lon- 
gitude, notice of, &. Hitchcock, 
ix, 107. 
Bailey, J. W., grasshoppers’ legs, 
a substitute for frogs in galvanie 
experiments, xxxi, 292. 
, washing-bottles, forms 
xxxi, 292.f 
,on the common blowpipe, 
xxxil, 319.f 
, excursion to Mt. Katahdin, 
of, 
Me., xxxii, 20.f 
, list of some plants in Maine, 
XXXil, 23. 
, hew test for nitric acid, xxxil, 
85.f 
, locality of hyalite, xxxii, 87. 
, effect of a current of air on 
flame, xxxii, 88.‘ 
,on the vascular system of 
ferns, xxxv, 113.f 
