Tubes, in sand, lightning, xx, 396.
—, see farther, [Fulgurites.]
—, flexible, elastic, T. Skidmore, v, 153.
Tubular sandpipes in chalk, C. Lyell, xxxviii, 122.
Tuckahoe or Indian bread, ii, 369.
Tuckerman, E., on the Geaster quadrifidus, xxxvi, 380.
—, on the Lichens of New England, xxxvii, 394.
—, observations on some plants of New England, xlv, 27.
—, Enumeratio Methodica Caricum, &c., noticed, xlv, 216.
Tufa, calcareous, in New York state, iii, 236; xv, 247; xviii, 354 (Chitteningo); xxviii, 176; xxxiii, 405.