Iso 
Tron pyrites, in North and South 
Carolina, ili, 3; v, 262; xl, 183. 
| — 2 Sein tA labama,xxiv, 39) 
5) an Canada, vill,-7 9. 
in Nova Scotia, 
213. 
—— sand, in Massachusetts, 1, 115. 
— in Connecticut,  vi,! 
232. 
—— 
5) XV, 
? 
, in Canada, vill, 79. 
, Silicate of, Bodenmais, xvill, 
164. 
, specular, association of, in 
Jefferson and St. Lawrence Cos., 
E. Emmons, x\, 81. 
3 , of volcanic origin, the- 
ory of formation of, G. Bischof, 
XXXV1, 237. 
: enbids 
Xxxvl, 237. 
, in Canada, vill, 76. 
, in Maine, x, 17. 
, in Massachusetts, 
Mitscherlich, 
9 
—— 
b) 
—— 
115, 438 
1, 
; ,in New Hampshire, 
xviil, 131. 
; , in New York, iv, 250; 
Dod ara dls ile 
, in Pennsylvania, iv, 4; 
> 
SVanos 
: , in Rhode Island, ix, 46. 
, sulphate of, in Massachusetts, 
i, 1155 viii, 56. 
; -, in Connecticut, v, 36 ; 
vili, 260; x, 13. 
, in New York, iv, 250; 
? 
xv, 243. 
; , in New Jersey, v, 265. 
——,, titanic, near Baltimore, Ma- 
ryland, T. G. Clemson, xvii, 42. 
Irradiation, notice of B. F. Joslin’s 
memoir on, xxvil, 389. 
Ischil, salt mines of, xxix, 225, 
Islands, floating, A. Petlengill, xii, 
122. 
, sudden formation of, from vol- 
eanic action, G. Bischof, xxxvi, 
2070 
, volcanic, near Sicily, thrown 
up, xxi, 399.f 
Isomeric compounds, xix, 383. 
134 
Jee 
Isomeric bodies, J. J. Berzelius on, 
xxvi, 178. 
Isomerism, remarks on, xxviii, 356. 
Isomorphism, H. Kopp’s views on, 
xlvi, 369. 
, exceptions to the law of, xxxv, 
302. 
Isopyre, analysis of, xv, 388. 
Italy, see Vesuvius and Volcano. 
Ives, A. W., chemical examination 
of hop, 1, 302. 
Ives, Eli, on a species of Limosella, 
1, 7A: 
, on the amount of nutritious 
matter afforded by an acre of 
land cultivated with potatoes or 
wheat, 1, 297. 
, new species of Asclepias, 1, 
2524 
» on spring pasture, ili, 355. 
Ivory paper, iil, 370. 
, vegetable, xlix, 400. 
oe 
Jackson, C. T., analysis of mineral 
waters from the Azores, xxxi, 94, 
96. 
: of the serpentine mar- 
ble of Vermont, xxxvili, 198. 
‘ of meteoric iron from 
Claiborne, Alabama, xxxiv, 332 ; 
xlvili, 145. 
: of Catlinite, xxxv, 388 ; 
XXXVI, 393. 
, composition of some kinds of 
grains, xlv, 339. 
, on the copper and silver of 
Kewenaw Point, Lake Superior, 
xlix, 81. 
, remarks on drift, xlv, 320. 
, geology and mineralogy of a 
art of Nova. Scotia, xiv, 305; 
xv, 132f, 201. 
, on certain portions of the ge- 
ology of Maine, xxxiv, 69. 
, geological reports on Maine, 
noticed, xxxii, 198; xxxv, 387 ; 
xxxvl, 148; xxxvil, 376. 
on N. Hampshire, 
xli, 883; xlviii, 3893; xlix, 27. 
