INDEX. 
E. 
Egeria, new planet, 276. 
Ehrenberg on Dust ‘showers, noticed, 37 
Electric agen ™ of induction ey ‘on! 
itself, J. 
Electro- a once ae 288. 
Electro-magnets, attuction by, 418. 
see farther, magnetis 
oes a associated meni J. .L. Smith, 
se 
Bepecng sist es from on &c., 280, 441. 
p new mine 
Ether, Williamson on, ng 
FE; 
Faraday, M., magnetic condition of nitrogen 
rada 
and oxygen, 276. 
relation of aa ty and electricity, 410. 
d diamagnetic condition of 
453 
Girard, C.,on Nemertes and Planarie, 41. 
Glacial Phenomena near Edinburgh, R. 
Chamber. 
Gnathodon eo of peenins 164, 
Gold of Canada, 
pain 
Goldachnie ny 8, obituary notice of, 
ol B. A. velocity of galvanic current 
tele graph v wires, 67, 154. 
Coupee new, H. A. Pr ‘out, 187. 
utta perc ean ad asa means of insulation, 
used pend printing ferns, &c., 280, 441. 
i 
se C. W., Trigonometry of, noticed, 
oxygen, 
magnetic : conducting power and atmos- 
pheric. magnetism, 
Feilitzch, aia in soft iron, 105. 
Feldspar, 22 
"Bion, of Nova Scotia and Labrador, H. R. 
rer, | 
the Wi iaiiileseciee, W. Prescott, 340.)| 
Fi eau, velocity of currentin Redbicts ices: 
Floral ealendar is ae in ie alee e 
1849." 
ren point of water lowered by pressure, 
n, J. 
Porahja, letter by, on 
G. 
new escapement for a clock, 406 
Laplanders, 136. 
_ Gabbro rosso of Tuscany, 206. 
Galvanic current, velocity of, in telegraph 
wires, 67, 153. 
maximum effect 
86. 
dJr., 
time needed for 
mportance in elec -tro-mechanics, 
w Daguerrotypes by, B. Silliman, 
ait evolved at negative pole, 
sparks, direction of, from Sitety cur- 
rents, &c, C. G. Page, 
Gambel bad obituary notice of, 143, 
Bas. rein of, 25 
Jagken, pasa of coppe region, by C. T. 
rt of, 116 
rvey of Pennsylvania, Mute, 
Geology of Coral reefs and Islands, J. D. 
-, of Florida Keys, M. Peat ool: 
of Spain, J J hia 
Haew J. M., analysis of tea, 250. 
Hale, c on Gnathodon beds of Mobile, 164. 
Ha agen, A. ee different chemical er piones 
waters of surface and bottom 
coal of Rhode Island, ail 
corrosion of copper shea 
| Hall, w genera of fossil so 308. 
Heat, iat of ice 
Git ot EB. oe sheittoes ‘stars of August, 1850, 
Y epiions for shooting stars in- Nov. 
Strachey, 244. 
C 
é S., analysis of tea, 251. 
Hii 'E. ae nalyses of teas communi- 
ted by, 
ambaldiine, 3 
Hunt, T. 8. ps none springs of Canada, 14, 
analys is of Warwickite, 352. 
Hubba <0. t's ces of minerals, 423. 
Hydra with emery, 55. 
f Pen neylvannia, 267. : : 
Hydrogen, remaplo’ ment of, in mineral ana- 
lysis, Z 
Hy pout dorsal dermal spine of, 299. 
si 
spe guarauna in New England, Dr. Cabot, 
435. 
Ice, eno wee: by, Perley, 425. 
latent to 
— ponte used by American, 314. 
uments of New York, ‘a G, Squier, 
nal 
W,, a 
thodon beds of Mobile, Hale, 164, 
nalysisof d ee 3m 
and Dec., 1850, 131. 
|| Hildreth, ‘s Ps Meteorological Journal for 
1850, 239. 
Himalaya, limit of perpetual snow of es 
ey, 3 i 
5 aggiimep action of cuminic acid on human — 
vs 
apr alt 
hy a 
iy 
‘ 9 
ota ee 
ess ae 
pee Neg 
pie. 
