SPE 
Space, planetary, Fourier on the 
temperature of, xxxii, 1. 
; »S. D. Poisson ibid, 
XXxiv, 57. 
; , idea of ether in, when 
introduced, xxxiii, l. 
; , ibid, R. W. Haskins 
on, xxxiil, l. 
, resistance in, to the motion 
of the heavenly bodies, xvii, 389. 
Spadiate, a new mineral, xlix, 394. 
Spafford, H. G., on groves of ey- 
ergreens, as screens for the gar- 
den, orchard, &c., xxii, 158. 
, oN spontaneous combustion, 
xxil, 161. 
Spain, difficulty of mineralogical 
excursions in, vill, 187. 
, yleld of Rio Tinto mine of 
copper, xxviil, 144. 
, mines of Almaden, xxviii, 21. 
, extracts from a journal, on 
the mining industry of, F. Le 
Play, xxviii, 17. 
, Madrid, science in, xix, 194. 
Spark extinguisher, xlii, 209.f 
, electric, see Electric. 
Sparks in the freezing of water by 
ether, Pontus, xxvi, 178. 
_ Sparrows, number of caterpillars 
taken by, ix, 200. 
Spatangus, see Zootocy, Radiata. 
Spathic iron, see Iron, carbonate of. 
Specific gravity, considered as a 
mineralogical character, xvi, 260. 
» on the means of ta- 
king, R. Hare, xi, 1214 
, anew instrument for, 
F. H. Baddely, xviii, 263.f 
of gases, a modification 
of the method for ascertaining, 
R. Hare, xvi, 293. 
, I. Thomson’s 
method of taking, ii, 362. 
of nitrogen, oxygen, 
chlorine, and of the vapors of 
carbon, sulphur,arsenic and phos- 
phorus, xxxv, 298. 
— — of various minerals, A. 
Breithaupt, xxxi, 268. 
of seawater, v, 129. 
31 
245 
SPI 
Specific heat of the gases, notice of 
dela Rive’s and Marcet’s memoir 
on, xili, 394. 
of certain solids, meth- 
od of determining, xxvii, 267. 
Spectacle glasses, manufactory of, 
xxvil, 80. 
Spectrum, solar, see Solar. 
Specula for telescopes, improve- 
ment in, xliv, 166. 
Speculum, Nasmyth’s pneumatic, 
xxxvill, 107. 
Spencer, A., vindication of claims, 
relating to the graphic art, xliv, 
Appendix. 
Spencer, T., on the electrotype and 
its use, xl, 157.f 
Spermaceti, composition of, pro- 
ducts of distillation of, and oxida- 
tion of, by nitric acid, J. Law- 
rence Smith, xliii, 301. 
» moving particles in, when 
burning, xl, 148. 
Sphene in Canada, viii, 76. 
in Massachusetts, vil, 53, 254 ; 
xxiv, 397. 
in New Jersey, v, 243, 244. 
in New York, ix, 40, 41, 251, 
402; xxi, 326. 
in Pennsylvania, x, 220; xiv, 
i 18: 
in Vermont, iv, 276. 
Sphenophyllites, generic characters 
of, vii, 182. 
Spherical trigonometry, elements of, 
xvil, 415. 
Sphinges, North American, xxxvi, 
282! 
Spiders, mode of forming the web 
of, xvili, 165. 
and spider-webs, J. Edwards, 
xxi, 109.f 
, gossamer, xvi, 399. 
, snake suspended by, xxvii, 
307.f 
, see farther, ZooLocy, Artic- 
ulata. 
Spinel in New York, viii, 92; ix, 
242) 25 li xxieeo. 
in New Jersey, v, 244; ix,245. 
Spinning frame, Brewster’s, x, 180, 
