issionary of the sixth century, i. 366.

Columbus, his early life, ii. 159.
Is confuted by the Council of Salamanca, ii. 161.
His voyage across the Atlantic, ii. 162.
Discovery of America, ii. 163.

Commerce, development of Mediterranean, i. 45.
Favourable to the spread of new ideas, i. 127,
many of the devices of modern, known to the Carthaginians, i. 130.

Communities, nature of progress of, i. 12.

Comnena, Anna, "Alexiad" of, ii. 59.

Condillac, his theory of memory and comparison, i. 232.

Conon of Alexandria, i. 194.

Constance, Council of, ii. 99.

Constantine the Great, the success of his policy, i. 277.
Influence of the reign of, i. 278.
Removes the metropolis, i. 279.
His tendencies to Paganism, i. 280.
His relations to the Church, i. 281.
His policy, i. 282.
Conversion and death, i. 283.
Attempts to check the Arian controversy, i. 286.
Denounces Arius as a heretic, i. 287.

Constantine, Pope, an usurper, his cruel treatment, i. 378.

Constantine Copronymus, his iconoclastic policy, i. 418.

Constantine Palaeologus, the last of the Roman Emperors, ii. 108.

Constantinople, Council of, i. 419.
Determines that Son and Holy Spirit are equal to the Father, i. 299.
The seventh general, held at, i. 419.
Sack of, ii. 56.
Its literature, ii. 58.
Siege of, by the Turks, ii. 107.
Fall of, ii. 108.

Convocation, charges against, ii. 235.

Copais, tunnel of, i. 32.

Copernican system, condemned by the Inquisition, ii. 263.
Theory of, rectified, ii. 268.

Copernicus, the works of, ii. 255.
His doctrine, ii. 256.

Copronymus the Iconoclast, i. 418.

Cordova, description of, ii. 30.

Corinth, mechanical art reached its perfection in, i. 132.
Her fall, ii. 109.

Cosmas Indicopleustes, his argument against the sphericity of
the earth, ii. 159.

Cosmo de' Medici, ii. 192.

Cosmogony, originates with Anaximander, i. 107.
Of Anaxagoras, i. 109.
Of Pythagoras, i. 115.

Cotton manufacture, ii. 385.

Councils, their object and nature, i. 236.
Are not infallible, i. 297.

Creations and extinctions, cause of, ii. 311.

Criterion of truth, existence of, doubted by Anaxagoras, i. 110.
One of the problems of Greek philosophy, i. 230.
Remarks on, i. 232.
A practical one exists, i. 235.

Criticism, effect of philosophical, i.