Turin (1747) and Antwerp
(1777). Stores of interesting rubrical information, interspersed with
verses and prayers, are to be found in the _De Libris Liturgicis_ and
the _Divina Psalmodia_; recent advances in liturgical studies, however,
have somewhat lessened their value. The _De Discretione Spirituum_
treats of certain higher phases of mysticism; the _Via Compendii ad
Deum_ was well translated in 1876 by Henry Collins, O. Cist., under the
title of _An Easy Way to God_. Sir Roger L'Estrange's translation (_The
Guide to Heaven_, 1680) of the _Manuductio ad Coelum_ was reprinted in
1898, and a new edition of the _Principia Vitae Christianae_, ed. by D.
O'Connor, appeared in 1906. The devotional treatise _De Sacrificio
Missae_ is the classical work in its field (new edition by Ildephonsus
Cummins, 1903).

The chief source for the life of Bona is the biography by the
Cistercian abbot Bertolotti (Asti, 1677); the best modern study is by
A. Ighina (Mondovi, 1874).

BONA (BONE), a seaport of Algeria, in 36 deg. 53' N., 7 deg. 46' E., on
a bay of the Mediterranean, chief town of an arrondissement in the
department of Constantine, 220 m. by rail W. of Tunis, and 136 m. N.E.
of Constantine. The town, which is situated at the foot of the wooded
heights of Edugh, is surrounded with a modern rampart erected outside
the old Arab wall, the compass of which was found too small for its
growth. Much of the old town has been demolished, and its general
character now is that of a flourishing French city. The streets are wide
and well laid out, but some are very steep. Through the centre of the
town runs a broad tree-lined promenade, the Cours Jerome-Bertagna,
formerly the Cours National, in which are the principal buildings
--theatre, banks, hotels. At its southern end, by the quay, is a bronze
statue of Thiers, and at the northern end, the cathedral of St
Augustine, a large church built in quasi-Byzantine style. In it is
preserved a relic supposed to be the right arm of St Augustine, brought
from Pavia in 1842. The Grand Mosque, built out of ruins of the ancient
Hippo, occupies one side of the chief square, the Place d'Armes. There
are barracks with accommodation for 3000 men, and civil and military
hospitals. The Kasbah (citadel) stands on a hill at the north-east of
the town. The inner harbour, covering 25 acres, is surrounded by fine
quays at which vessels drawing 22 ft. can be moored. Beyond is a
spacious outer harbour,