• INDEX. 
i'2'I 
Hiatory of chemical discoveries, 299* 
Hiifeland on the comparative number of sexes at birth, 29^* 
Humboldt on the distribution of heat over the globe, 1, 256. — On the 
cavern of the Guacharo, 83 . — On the temperature of mines in Ame- 
rica, 286. 
Huygens* theory of double refraction, account of, 277, 148. — Remarks 
on his discoveries, 285. 
Hydrogen, the flame of, rendered luminous, 404. 
Hydrogen changes the human voice, 194. 
I J 
Icebergs, account of, 237. 
Iceland Moss, on the uses of, 41 6. 
Jets of water, on their application to drive water-wheels, 195. 
Indigo, analysis of, 199* 
Infants, singular method of treating them when asleep, 221. 
Iodine, account of a curious experiment with, 404. 
Johnson, Mr, on the eclipse of the sun, 392.— On the nocturnal frag- 
rance of different plants, 415. 
lolite, on the dichroism of, 246. 
Ipsambul, account of the subterranean temple of, 62. 
Iron, globular carbonate of, 315. 
Iron-ores, on the deoxidation and reduction of, 315. 
Isocheimal Lines, 273. 
Isometrical Perspective, 184. 
IsGtheral Lines, 273. 
Isothermal Lines, 1, 256. 
Jumnotree, or the source of the Jumna, account of, 226. 
Jura, height of different points of, 418. 
K 
Keir, Mr, first suggests the identity of the Congo and the Niger, 102* 
King, Captain Henry, on Pitcairn’s Island, 380. 
Kirwan*s observations on climates, 12. 
Klaproth, M. on the archipelago of John Potocki, 253. 
Kutch, account of the earthquake at, 120. 
account of a dreadful storm at, I98. 
L 
Lambert on mean temperatures, 9. 
Languages of Loango and Mayumba, 215. 
La Place, Marquis de La, on meteoric stones, 197. 
Lasarem's expedition into the frozen ocean, 4 1 6. 
Lassaigne and Feneuelle, MM. on delphine, 305. 
Latta, Dr, on icebergs, 237- 
Lead-ore, account of new species of, 117^ 138. 
Light, absorption of, by crystals, 243. 
Livingston, Mr, on the thermometer as an indicator of a ship's ap- 
proach to land, 247. 
Loango tongue, specimen of it, 215. 
Luminosity of n'ood steeped in lime, Xt., 343. 
