Z2EU 
Young, T., memoir of, xxii, 232. 
Young, Dr., cabinet of, at Eden- 
ville, N. Y., for sale, xxviii, 400 ; 
Xxxvl, 393. 
Yttro-cerite in Massachusetts, E. 
Hitchcock, xlv, 331; xlvii, 351, 
253. 
, stated to occur in New Jer- 
sey, vi, 379. 
Zin 
Zabians, remarks on the idolatry 
and philosophy of, J. W. Draper, 
xxvill, 201. 
Zabriskie, J. B., experiments on 
the induction of metallic coils, 
xxxil, 308.f 
, model of an electro-magnetic 
engine, xxxii, 313.f 
, construction of galvanic mag- 
nets, xxxvi, 124.f 
, electro-magnetic 
xxxvi, 129.f 
Zacatecas, mines of, xxiv, 230. 
Zach, Baron de, some account of, 
xvi, 209; xxiv, 194. 
Zafire, new mode of preparing, 
xxvill, 147. 
Zamia, fossil fruits of, G. A. Man- 
tell, xlv, 401. 
——, sussexiensis, xlv, 401. 
Zanesville Atheneum, cabinet of, 
xxv, 229 ; xxxi, 79; 
rotations, 
297 
, coal formations, 11, 5; xxv, 
~ 228. 
, remarks on, xxv, 228. 
Zantedeschi, F., memoirs of, on 
the electrotype, noticed, xliii,| 
390. 
Zeolite, recent formation of, xx, 382. 
Zeolites, order of superposition in| 
amygdaloidal cavities, xlix, 59. 
, not usually formed at the for- 
mation of the containing rock, 
J. D. Dana, xlv, 116. 
Zeolitic minerals, origin of, J. D.| 
Dana, xlix, 52. 
"On Berean Fie IN... J, 
xl, 69; xliv, 54. 
ZIR 
‘Zeuglodon, not a reptile, R. Owen, 
xxxix, 204. 
, geognostic position of, xxxviil, 
, skeleton of, S. B. Buckley, 
xliv, 409. ‘ 
, skeleton of, obtained by A. C. 
Koch, xlix, 218. 
Zeus crinitus, S. L. Mitchill, xi, 
144.f 
Zinc, action of dilute sulphuric acid 
on, xix, 372. 
blende, see Blende. 
, equivalent of, xlviii, 187. 
, separation of, from manga- 
nese, xlvil, 194; xlviii, 187. 
, as a covering for buildings, 
A. Caswell, xxxi, 248. 
——, ibid, L. D. Gale, xxxii, 315. 
, ore of, containing iodine, xvi, 
389. 
——,, biseleniuret of, xvili, 391. 
and ammonia, carbonate of, 
xlix, 200. 
mines of Franklin, N. Jersey, 
F. Alger, xlviti, 252.f 
, carbonate of, or calamine in 
Missouri, xii, 376. ' 
——, ——, in Michigan, xli, 185. 
, Silicate of, or electric cala- 
mine in Michigan, xli, 185. 
ores of New Jersey, analyses 
of, i1, 319. 
, (Franklinite) re- 
duction of, v, 242. 
, red oxide of, v, 242. 
, analysis of, A. 
A. Hayes, xlviii, 260. 
, oxide of, or Ancramite, J. 
Torrey, v, 235, 399. 
, —— ibid, identical with cad- 
Zeuglodon, R. Owen, xxxvii, 231. 
mia and of furnace origin, vi, 180. 
> ——, at Ancram, N. Y., J. 
Torrey, V, 239. 
, sulphuret of, see Blende. 
Zipaquera in New Grenada, salt 
works of, xxxii, 89. 
Zircon, fusion of, ii, 292. 
, from Vermont, C. U. Shep- 
ard, xvii, 358.f 
—, —_., in Virginial xiao, 
