DR A 
Transition epoch, nature of organ- 
ic life during, xxxvi,, 12. 
, fossils characteristic of, T. 
A. Conrad, xxxv, 246. 
rocks of the Cataraqui, xvill, 
85; xx, '74f; xxiv, 97!; xxx, 233.f 
Transpiration of half the body, 
xxxix, 400. 
Transplanting of trees, xxii, 388. 
Transylvania, volcanic character of, 
xi; 251. 
Trap formation of Antigua, S. Ho- 
vey, Xxxv, 76. 
of New England and New 
Jersey, volcanic origin of, 7:| 
Cooper, iv, 239. 
, igneous origin of, B. 
Silliman, xvii, 119. 
with the sandstone, v, 240. 
, peculiar porous character of, 
v, 240. 
, and minerals of, in Nova 
Scotia, by Jackson and Alger, 
xiv, 805; xv, 132/, 204. 
— of the Copper Mountains, 
northern America, xvii, 8. 
dikes, crescent form of, first 
observed by J. G. Percival, xlvi, 
205. 
remarks 
on, xlv, 334. 
of Maine, of four dif- 
b) 
267 
of New Jersey, connection) 
TRE 
Trap dikes in Massachusetts, at 
Lowell, Nahant, &c., xxvii, 342. 
in New York, Essex 
Co., connection of, with iron ores, 
E. Emmons, x\, 81. 
; »,— W. C. 
Redfield, xxxiii, 316. 
in Michigan, D. Hough- 
ton, xli, 184. 
(natural walls) in North 
Carolina, J. Beckwith, v, 1. 
ibid, xiv, 242. 
in Pennsylvania, H. D. 
Rogers, xli, 178. 
, a hundred and twenty 
mileslong,in England,xxxviii,127. 
render limestone mag- 
nesian, xxix, 351. 
, and rocks altered by, xx, 170. 
minerals, origin of, J. D. Da- 
na, xlix, 49. 
of New Jersey and 
New York, xliv, 54.f 
of Nova Scotia, xiv, 
305; xy, 132, 204. 
tufa of the Connecticut river 
valley, H. Hitchcock, viii, 245; 
xlvu, 103. 
Trap, optical, for catching animals, 
v, 200. 
‘Trapezium paddle-wheels, xlii, 336. 
Traveller’s Society, v, 175. 
Travels, Stevens’s, in Egypt, Ara- 
b) 
9 
ferent ages, C. T. Jackson, xxxvi, 
145. 
in Vermont, at Mont- 
gomery, xxil, 189. 
in gneiss and granite, in 
New Hampshire, O. P. Hubbard, 
xxxiv, 105.f 
in the Connecticut val- 
ley, vi, 46, 47. 
in Connecticut, xxvii, 
104.f 
— ——, B. Silliman, Jr., 
xlvii, 107. 
, Junction of, with 
sandstone, A. B. Chapin, xxvii, 
104, 
—— ——, ibid, B. Silliman, 
xvii, 123.f 
bia, &c., noticed, xxxii, 398. 
Travelli, J. S., meteorological re- 
gister kept at Singapore, Nov. 
1839 to Feb. 1841, xliv, 151. 
Travelling with dog-sleds in the 
northwest, xiii, 391.f 
Travertine, deposit of, xxxiv, 152. 
Tree from which water drops in 
great quantities, xv, 170. 
, fossil, see Fossil. 
Trees, beach, interlocking of, xxxii, 
379. 
—, fruit, propagation of, xxvii, 
288. 
, a new method of grafting, ii, 
358. 
, method of transplanting, xxii, 
383. 
