FoR Wv 
France, fires in, few, xxv, 291. 
, mortality of infants, xix, 192. 
——, phthisis in, 1828, xix, 193. 
, population of, xv, 397. 
, scenery in some parts of, x, 
167. 
Franconia iron works, vill, 180. 
Franklin, B., original letters of, iv, 
35975; v, 157. 
Franklinite, 11, 323; 
ore,) 242, 400. 
Fraser, John, botanical labors of, 
An Gray, Xl: 
Fresco painting, means of detach- 
ing, lv, 384. 
Fredonia gas works, xvii, 398. 
Freestone of Sugar Loaf moun- 
tain, Maryland, xxvii, 21. 
Freezing mixture, Boutigny’s, xxx, 
168. 
v, 41, (shot 
, xii, 195. 
point, influenced by pressure, 
Wii Cae Be cia. xiv, ¥49: 
water, effect from, in a Ley- 
den jar, vil, 374. 
, by the aid of sulphuric 
acid, apparatus for, R. Hare, 
xxvii, 132.f 
93 
Frodsham, W. J., on the vibration 
of pendulums with different sus- 
pending springs, xxxvil, 278. 
, elected a member of the 
Royal Society, xxxvi, 195. 
Frogs, introduction of, into Ireland, 
Xxvill, 398. 
, In rocks, remarks on, D. 
Thomas, xix, 167. 
Fromont garden, account of, xx, 83. 
Frozen wells, xxxvi, 184. 
Fruit, method of preserving with- 
out sugar, xv, 381. 
, fossil, of Zamia, &c., G. A. 
Mantell, xlv, 401. 
trees, to destroy worms at- 
tacking, xxvii, 197. 
, propagation of, xxvi, 183. 
, time of flowering and 
other memoranda for different 
seasons, at Marietta, Ohio, see 
Floral Calendar and Meteorolog- 
ical Register. 
12 
FUM 
Fucoids and other marine plants, 
Ad. Brongniart, ix, 375. 
in Indiana, J. T. Plummer, 
xliv, 290.f 
in rocks of western N. York, 
Xxxvi, 46. 
in Pennsylvania, xx, 415; 
XXVil, 347. 
Fucoides Harlani, xxxvi, 46; xlviil, 
299.f 
bilobata, xlviii, 307.f 
demissa, xl vii, 360.f 
Fuego, Tierra del, rush of, xviil, 
189. 
Fuel, E. North on, xi, 66. 
, amount of, consumed in New 
York city, xvi, 360. 
, economy of, W. R. Johnson, 
xxill, 318.f 
, of coal tar and water, C. Dau- 
beny, xxviii, 71. 
Fulgurites, or lightning tubes in 
sand, xx, 396. 
, siliceous tubes, Rome, N. Y,, 
C. E. West, xlv, 220. 
, near Drasien. remarkable, 
xlvi, 210. 
, in chalk, cause of, C. Lyell, 
MX VIS. 
Fuller’s earth in Connecticut, 1, 
Ba lUT}. 
Fulminating compounds, prepara- 
tion of, S. Guthrie, xxi, 288, 293. 
gold, ii, 8350; xlvii, 142. 
silver, xvill, 335. 
, of Berthollet, xviii, 155. 
, Mitscherlich’s mode of 
preparing, xix, 379. 
, injury to R. Hare from 
the explosion of, xxii, 185. 
powders, caution against, 1, 
168. 
187. 
, use of crackers of, xxvi, 
, of cyanogen and calci- 
um, R. Hare, xxxvii, 268. 
, new, made with saltpe- 
tre, sulphur, &c., xvi, 397. 
‘Fulminic acid, composition of,x,191. 
Fumigation, x, 379. 
, in Sweden, vil, 188. 
