Part 47

Geotropism, 289.

German schools and gymnasiums, 372, 373, 338, footnote.

Ghosts, photographic, 73.

Glass, invisible in a mixture of the same refrangibility, 312; powdered, visible in a mixture of the same refrangibility, 312.

Glove, in a mirror, 93.

Goethe, quotations from, 9, 31, 49, 88; on the cause of harmony, 35.

Goltz, 282, 291.

Gossot, 332.

Gothic cathedral, 94.

Gravitation, discovery of, 225 et seq.

Gravity, how to get rid of the effects of, in liquids, 4; also 228.

Gray, Elisha, his telautograph, 26.

Greased plate, drop of water on a, 8.

Great minds, idiosyncrasies of, 247.

Greek language, scientific terms derivedfrom, 342-343; common words derived from, 343, footnote; still necessary for some professions, 346; its literary wealth, 347-348; narrowness and one-sidedness of its literature, 348-349; its excessive study useless, 349-350; its study sharpens the judgment, 357-358; a knowledge of it not necessary to a liberal education, 371.

Greeks, their provinciality and narrow-mindedness, 349; now only objects of historical research, 350.

Griesinger, 184.

Grimaldi, 270.

Grimm, 344, footnote.

Grunting fishes, 306.

Habitudes of thought, 199, 224, 227, 232.

Haeckel, 222, 235.

Hamilton, deduction of the conical refraction of light, 29.

Hankel, 364.

Harmonics, 38, 40.

Harmony, on the causes of, 32 et seq.; laws of the theory of, explained, 30; the investigation of the ancients concerning, 32; generally, 103. See Consonance.

Harris, electrical balance of, 127, footnote.

Hartwich, Judge, 343, 353, footnote.