s IL 
Siliceous buhr millstone deposits of 
Ohio, hot water origin, xxix, 45. 
—— minerals, on the treatment of, 
by carbonated alkalies, xviii, 404. 
, Solution of, by steam, 
xl vill, 397. 
glass from burning hay, xix, 
395; xxiv, 174. 
corals, 1, 141. 
shells, corals and wood of An- 
tigua, S. Hovey, xxxv,'79 ;—due 
to siliceous solutions, 82. 
Sinter of the Azores, J. W. 
Webster, iil, 391. 
springs and deposits in India, 
Newbold, xlix, 398. 
substances, porosity of, vii, 
192. 
, containing siliceous in- 
fusoria and minute organic re- 
mains, Turpin, xxxii, 400. 
Silicie acid, see Silex. 
ether, Edelman, xlix, 192. 
Silicification of fossils, proceeding 
from thermal springs in Florida, 
C. U. Shepard, xxv, 165. 
of wood, xxxiii, 108. 
, remarks on, J. D. Dana, 
xlvili, 88, 897; xlix, 227. 
Silicified wood, see Fossil. 
Silicon, how obtained, ix, 377. 
» 2 process for obtaining, R. 
_ Hare, xxii, 189; xxiv, 247f; xl, 
28. 
, production of, from paracy- 
anogen, S. M. Brown, xli, 208. 
—-, on the alleged conversion of 
carbon into, xiii, 193. 
Silk, on the manufacture of, 
America, xvili, 882; xix, 175. 
in 
culture of, xvii, 202; xviii, 278.) 
——.,, practical instruction concern- 
ing, xvili, 207, 278. 
, on the culture of, in India, 
xls 39: 
grown at Nottingham, Eng- 
“nine xxxvill, 180. 
Silk- -worm, amount of silk from one, 
vill, 391. 
> NeW, XXXiil, 206. 
30 
, review of F. Pascalis on the 
237 
SEL 
Silliman, B., geological notices of 
New Haven and Litchfield Cos., 
Conn., ii, 201. 
., on prussic acid, ii, 81. 
, experiments with the gas blow- 
pipe, il, 282; iii, 89; vi, 349. 
» on an argentiferous galena 
from Huntington, Ct., and mis- 
cellaneous observations on lead 
ores, lil, 173. 
, circumstances connected with 
the formation of ice on still was 
ters, il, 179. 
, progress of American sci- 
ence, v, 197; xlili, 224. 
, tempest of Sept. 3, 1821, iv, 
WY 
———, natural ice-houses, iv, 174. 
; conversion of cannon balls 
into plumbago, iv, 179. 
, yellow oxide of tungsten, iv, 
187. 
, fusion of charcoal, graphite, 
anthracite, &c. with the deflagras 
tor, v, 108, 361; vi, 341, 378; 
x, LOO P19: 
; ibid, with the com- 
pound blowpipe, vi, 349. 
, relations between the calori- 
motor and deflagrator, and other 
galvanic batteries, vi, 337. 
, application of fluor to etch- 
ing glass, vi, 354. 
, on the cutting of steel by 
soft iron, vil, 342. 
——, on the economical use of the 
anthracite of Pennsylvania, x, 331. 
5 of R. Island,x1,78. 
—-, on the igneous origin of some 
trap rocks, xvii, 119. 
, on the anthracite region in 
the Lackawanna and Wyoming 
valleys, xviii, 808.f 
, hotes on Mauch Chunk and 
other anthracite regions of Penn- 
sylvania, xix, l. 
, on the safety of steamboats, 
xix, 142. 
, notice of a fountain of petro- 
lium, or oil spring, of Allegany 
Co., N. Y., xxiii, 97, 
