4.

Hypocrisy, organization of, i. 54.

Iamblicus, a wonder-worker, i. 215.

Iconoclasm, i. 416.

Ideal theory, Plato's, i. 153.
Criticism on, i. 161.

Illiberis, Council of, condemns the worship of images, i. 414.

Images, bleeding and winking, i. 415.

Image-worship resisted by Charlemagne, i. 372.
Fostered by the Empress Helena, i. 414.
In the West, i. 415.

"Imitation of Christ," tendency of, ii. 196.

Immortality, double, implied by Plato's doctrine, i. 161.

Impulses, two, against the Church, ii. 131.

Incandescence, the production of light by, ii. 384.

Incarnations, divine, necessary consequence of the belief of, i. 91.

Incas, the ancestors of one of the orders of nobility among the
Peruvians, ii. 183.

Incombustible men, i. 409.

Index Expurgatorius, promulgated by Paul IV., ii. 214.

Indian, American, i. 27.

Indo-Germanic invasion, i. 32.

Inductive philosophy founded by Aristotle, i. 76.

Indulgences, nature of, ii. 207.

Innocent I., Pope, settles the Pelagian controversy in favour
of the African bishops, i. 294.

Innocent III., Pope, his interference in behalf of temporary
political interests, ii. 53.
His death, ii. 62.
Prohibits the study of science in the schools of Paris, ii. 76.

Innocent IV., Pope, excommunicates Frederick, ii. 72.

Innocent VIII., Pope, his bull against witchcraft, ii. 116.

Inquisition, its origin, ii. 62.
Attempts to arrest the intellectual revolt, ii. 74.
Its sacrifices, ii. 188.
Its effect on Protestantism in Spain and Italy, ii. 220.

Insane, Diogenes' view of the, i. 102.

Insect an automatic mechanism, ii. 349.

Institutes of Menu, i. 63.

Intellect, the primal, Anaxagoras's view of, i. 108.

Intellectual class, the true representation of a community, i. 13.
Despair, ii. 52.

Intellectual impulse makes its attack through astronomy, ii. 133.
Development the aim of nature, ii. 359.

Interstitial death, i. 14.
Creations, ii. 312.

Investitures, the conflict on, ii. 17.

Invisible, localization of the, i. 36.

Ionian philosophy, puerilities of, i. 106.

Irene, the Empress, puts out her son's eyes, i. 374.
Her superstitious cruelty, i. 420.

Iris, its function, i. 5.

Isis, her worship, i. 187.

Isothermal lines, i. 24, 26.

Israfil, the angel, i. 345.

Italian Christianity, bou