ARC 
Apparatus for the evolution of prus- 
sic acid, R. Hare, xxix, 244.f 
for evolving silicon from fluo- 
silicic acid, R. Hare, xxiv, 247. 
for decomposition and recom- 
position of water, xxxviii, 336.f 
galyano-ignition, xxvi, 352!; 
xxxii, 282. 
for solidifying carbonic acid, 
J. Johnston, xxxviii, 297; xlii, 
203. 
for illustrating absorption of 
heat, A. D. Bache, xxviii, 320.f 
16 
hydrogen gas, vil, 392. 
self-regulating 
voir, R. Hare, xi, 140.6 
for experiments on inflection 
and interference of light and caus- 
tics, E. S. Snell, xlviix, 24,f 26.f 
for illustrating waves, EH. S. 
Snell, xlix, 20.f 
volumeter, R. Hare, xii, 36.f 
volumescope, R. Hare, xv, 
275! ; xxviii, 264.f 
reser- 
, electrical, see Electric. 
, electro-magnetic, see Elec- 
tro-magnetic. 
, eudiometric, see Eudiometry. 
Apprentices, manufactory of, iv,379. 
Aqueducts, on the Roman, M. Gen- 
deys, xix, 389. , 
Arabia, notice of a memoir on the 
province of Oman in, xxxii, 383. 
Arabic words in English, J. W. 
Gibbs, xxxiii, 324. 
Ararat, Mount, extinct volcano near, 
Xxxvil, 349. 
Araucanian races, remarks on, S. 
G. Morton, xxxviii, 341.f 
Arch, some properties of a ram- 
pant, T. Gorton, xxvii, 303.f 
Arches, method of describing curves 
for, J. Thomson, xxiv, 73.f 
,on tracing oval, E. Miller, 
xxii, 303.f 
Archeologia Americana, li, 357. 
Archimedes, on the spiral of, by A. 
B. Quimby, ix, 316.f 
Archimedes, a fossil coral, D. D. 
ARS 
Architecture, in the United States, 
xvii, 99, 249f; xviii, 11, 212. 
, Grecian style, the propriety 
of its application to modern uses, 
xvlil, 218. 
, Gothic style, notice of, xviii, 
220. 
Architectural improvements, 
Lord, xxv, 304. 
—— monuments, xviii, 229. 
Arctic regions, sketch of geology 
of, xvii, 1. 
Argentine, notice of, C. Dewey, vii, 
248. : 
——., analysis of, C. Dewey, vi,3388. 
, locality of, in Massachusetts, 
vill, 34. 
Argento-cyanate of silver, for ful- 
minating silver, xvill, 335. 
Argento-cyanic acid, xviii, 334. 
Argillaceous slate, in western Mas- 
sachusetts, vill, 18, 21, 29. 
Argillite, of the Connecticut valley, 
account of, vi, 35. 
Aristotle, notice of, C. Fox, xxxvi, 
217. 
Armature, see Electro-magnet and 
Magnet. 
Arragonite, analysis of, M. Strome- 
yer, vil, 368. 
, In Canada, vii, ‘70. 
, in New York, xxi,326 ; xxvill, 
Qe 
, of New Jersey, J. Finch, xviii, 
197. 
Arragonite and cale spar, Becque- 
rel, KX sSiei 9 
Arsenic, on the detection of, L. 
Feuchtwanger, xix, 339.f 
E. 
Owen, xliii, 19.f 
Architecture, notes on, xxiv, 257.f 
——, application of Riench’s test, 
D. P. Gardner, xliv, 240. 
——, onthe detection of, J. L. 
Smith, xl, 278; xlii, '75.f 
——, tests for, ill, 854; iv, 155; 
xliv, 213. 
——, on the iodide of potassium a 
test for, J. P. Emmet, xviii, 58. 
——, tobacco a remedy for, xxxi, 
188. 
, oxide of iron an antidote for, 
xxvill, 135. 
