n crusade, ii. 21.
Said to have introduced a knowledge of the Arabic numerals into
Europe, ii. 49.

Germans not prone to idolatry, i. 415.
Insist on a reform in the Papacy, ii. 2.

Gesner, Luther's opinion of the manner of his death, ii. 117.
Leads the way to zoology, ii. 284.

Gilbert proposed to determine the longitude by magnetic
observations, ii. 167.
Adopts the views of Copernicus, ii. 260.
Publishes his book on the magnet, ii. 284.

Gilbert of Ravenna elected antipope, ii. 20.

Gisella, Queen of Hungary, assists in the conversion of her
subjects to Christianity, i. 365.

Glass, its rate of dilatation by heat, ii. 300.

Globes, used by the Saracens, ii. 41.

Gobi, dry climate of, i. 25.
Character of its botany, i. 25.
Was once the bed of a sea, i. 29.

Gold, Ancient value of, i. 251.
Potable, attempts to make, i. 407.
Problem of, solved by Djafar, i. 409.

Gotama, the founder of Buddhism, life of, i. 67.

Goths become permanently settled in the Eastern empire, i. 300.
Adopt the Byzantine system, i. 349.
Have possession of Italy, i. 350.
Date of their conversion, i. 365.

Gotschalk, his persecution, ii. 8.

Graaf, a physiologist, ii. 286.

Greece, Roman invasion of, i. 247.

Greek mythology, i. 38.
Transformations of, i. 43.
Cause of its destruction, i. 44.
Secession of literary men and philosophers, i. 47.
Movements repeated in Europe, i. 53.
Philosophy, origin of, i. 94.
Summary of, i. 141.
Its four grand topics, i. 223.
Fire, i. 408.
Learning, revival of, ii. 193.
Cause of dislike of, ii. 195.

Gregory II., Pope, defends image-worship, i. 421.

Gregory III., Pope, defies the emperor, i. 423.

Gregory VI., Pope, purchases the Papacy, i. 381.

Gregory VII., his policy, ii. 15.

Gregory IX., Pope, excommunicates Frederick II., ii. 67.

Gregory XI., Pope, restores the Papacy to Rome, ii. 96.

Gregory XII., Pope, deposed by the Council of Pisa, ii. 97.

Gregory the Great, his history, i. 355.
Burns the Palatine Library, i. 357.
Attempts to reconvert England, i. 366.

Gregory of Nazianzum, his opinion of Councils, i. 299.

Grew discovers the sexes of plants, ii. 286.

Grimaldi discovers the diffraction of light, ii. 390.

Grostete, Robert, Bishop of Lincoln, the result of his inquiry
into the emolument