SIL 
Silver, fulminating, of Berthollet, 
Xvill, 155. 
5 » Mitscherlich’s mode 
of preparation, xix, 379. 
» on some of the substances 
which may be used in forming 
a metallic mirror by the precipi- 
tation of the oxide of, xlix, 398. 
, hyperoxide of, xlix, 194, 391. 
, purple precipitate of, xxii, 
, German, made by Frick, xiii, 
172. 
——,, imitation, xxill, 195. 
, preparation of pure nitrate of, 
v, 048; xxiv, 370. 
, nitrate of, reduced by re- 
maining in a pasteboard box,’ 
xvill, 400. 
9 
by sun’s rays, xxxv, 298. 
, native, at Huntington, Conn., 
vi, 2380. | 
9 
, ——, of Davidson Co., N.C.,! 
xli, 183, 349. 
» ——, in Michigan, Lake Su- 
perior, xli, 185; xlix, 81. 
of Lane’s mine, analysis of, 
W. W. Mather, xxvii, 256. 
,in the Southampton 
mines, Mass., xxii, 63. 
» fruitless search for, in Ohio, 
xxv, 224, 
ores, reduction of, W. W. 
Mather, xxiv, 218. 
, yield of Russian mines of, 
ee BW ae 
mines of Nertchinsk, xvii, 34. 
=== of thei Hartzsxixy MS: 
lead | 
43. 
| ————=-, Pasco, 8. Almer- 
ica, sketch of, De Rivero, xvii, 
43.f 
——— 
8. 
, Carapaca, xtliv, 
of Mexico and South 
America, xxiv, 213, 226. 
—— —— of Davidson Co., North 
Carolina, xli, 188, 348. 
239 
» pure, not blackened, 
Silver, sulphuret of, in New York, 
I, 207. 
ore, red, analysis of, v, 377. 
paper, mode of imitating, xix, 
189. 
Silvering copper, xxiii, 386. 
-—— glass, Drayton’s method, xlix, 
198. 
iron, xxx, 169. 
Simond, L., notice of, xxiii, 371. 
‘Sines and cosines of the sum and 
difference of two arcs, formule 
for, T. Strong, 1, 424.f 
, rational expression for, D. 
Gould, xxii, 392. 
‘Singapore, climate and productions 
of, J. S. Travelli, xliv, 151. 
Siren, notice of genus and species, 
D. H. Barnes, xi, 281. 
Sismondine, analysis and descrip- 
of Peru and Chili, xvii,|) 
tion of, A. Delesse, x\vii, 217. 
Sium tricuspidatum, xi, 175. 
Sivatherium, xxxi, 170; xxxiil, 104. 
, in New Jersey, v, 401. Size for artists, receipt for, xxi, 168. 
, new, for the chain of woven 
cloth, xxii, 366. 
for cotton or linen, preparation 
of, xxii, 367. 
Skeleton, human, of Guadaloupe, 
J. Moultrie, xxxii, 361. 
——, ———. ancient in Ohio,n, 242. 
» preservation of, xix, 57. 
Skene, J., on the emigration of a 
colony of caterpillars, ix, 284.f 
, graduation of thermometers, 
xii, 397. 
Skidmore, T., formation of flexible 
elastic tubes, v, 153. 
Skins, preservation of, xi, 397. 
» ——, see farther under Pres- 
ervation. 
Skugisan, xxvi, 388. 
Skull found in a tree, iv, 377. 
, of Guadaloupe human skel- 
eton, J. Moulirie, xxxii, 361. 
Skulls, singular variety of, from 
Peru and Bolivia, xxviii, 78. 
, American, observations on, 
J. C. Warren, xxxiv, 47. 
» ——, S&S. G. Morton on, 
xxxvili, 841.f 
