describes nitric acid and
aqua regia, i. 410.

Djondesabour, medical college of, founded by the Nestorians and
Jews, i. 391.
Patronized by the Khalif al Raschid, i. 402.

Docetes, their ideas of the nature of Christ, i. 270.

Dogmatists, their theory of the treatment of disease, i. 399.

Dominic, St., wonders related of, ii. 63.

Dominicans, they oppose Galileo, ii. 262.

Donatists recalled from banishment by Constantine, i. 281.

Drama, an index of national mental condition, ii. 249.

Draper's Physiology quoted on cerebral sight, i. 430.
On the benefits conferred by the Church, ii. 145.
On the necessity of resorting to anatomy and physiology, ii. 343.

Dreams, Algazzali's view of their nature, ii. 51.

Druids, i. 241.

Du Molay, burnt at the stake, ii. 92.

Duns Scotus, John, a Franciscan monk, the rival of Thomas
Aquinas, ii. 14.

Duverney on the sense of hearing, ii. 286.

Ear, i. 5.

Earth, globular form of, implied by the voyage of Columbus, ii. 164,
proved by its shadow in eclipses of the moon, ii. 171.
Is not the immovable centre of the universe, ii. 254.
Age of, ii. 278.
Its slow cooling, ii. 301.
Mean density of, ii. 302.
Movement of the crust of, ii. 306.
Development of life on, ii. 355.

Earthquakes, ii. 302.

Easter, dispute respecting, i. 291.

Ebionites, their doctrine of our Saviour's lineage, i. 272.

Ebn Djani, physician to the Sultan Saladin, and author of a
work on the medical topography of Alexandria, ii. 124.

Ebn Junis, a Moorish astronomer, ii. 41.
Astronomical table of, ii. 42

Ebn Zohr, competitor of Raschi, ii. 123.

Ecclesiasticism, its decline, ii. 143.
Its downfall, ii. 284.

Eclipse, solar, predicted by Thales, i. 97.

Ecliptic, discovery of obliquity of, falsely imputed to
Anaximenes, i. 99.
Determined with accuracy by Almaimon, ii. 41.
Slow process of its secular variation, ii. 304.

Ecstasy, i. 213.

Edessa, church of, re-built by Moawiyah for his Christian
subjects, i. 338.

Edward I. of England compels the clergy to pay taxes, ii. 81.

Egypt, conquest of, by Cambyses, i. 79.
Antiquity of civilization in, i. 81.
Pre-historic Life of, i. 81.
Influence of, on Europe, i. 82.
Antiquity of its monarchy, i. 84.
Geological age of, i. 87.
Geography and topography of, i. 87.
R