Fourier, temperature of our planetary system, 155, 172, 176.
Fracastoro on the direction of the tails of comets from the sun, 101.
Fraehn, fall of stars, 119.
Franklin, Benjamin, existence of sandbanks indicated by the coldness of the
water over them, 308.
Franklin, Capt., on the Aurora, 197, 199, 200, 201; rarity of electric
explosions in high northern regions, 337.
Freycinet, pendulum oscillations, 166.
Fusinieri on meteoric masses, 123.
Galileo, 104, 167.
Galle, Dr., 91.
Galvant, Aloysio, accidental discovery of galvanism, 52.
Gaseous emanations, fluids, mud, and molten earth, 217, 220.
Gasparin, distribution of the quantity of rain in Central Europe, 333.
Gauss, Friedrich, on terrestrial magnetism, 179; his erection. in 1832, of a
magnetic observatory on a new principle, 191, 192.
Gay-Lussac, 204, 233, 234, 266, 267, 311, 312, 334, 336.
Geognostic or geological description of the earth's surface, 202-286.
Geognosy (the study of the textures and position of the earth's surface),
its progress, 203.
Geography, physical, 288-311; of animal life, 341-346; of plants, 346-351.
Geographics, Ritter's (Carl), "Geography in relation to Nature and the
History of Man," 48, 67; Varenius (Bernhard), General and Comparative
Geography, 66, 67.
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