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Apostolic (APOSTOLICAL per- APOSTOLICAL)

or APOSTOLICAL, per- APOSTOLICAL , pertime of the apostles, constituted accord.

Apostolic Church. - The Church in the ing to their design. The name is also given to the four churches of Rome, Alexandria, Antioch, and Jerusalem, and Church, and occasionally by the Episcois claimed by the Roman Catholic palians.

Apostolic Constitutions and Canons.the apostles, but generally supposed to be A collection of regulations attributed to spurious.

They appeared in the 4th century; are divided into eight books, and consist of rules and precepts relating to to the ceremonies and discipline of the the duty of Christians, and particularly Church.

Apostolic Delegate. - A permanent repcountry. resentative of the Pope in a foreign It is sometimes confounded ing a temporary representative of the with the word ablegate, the latter meanthe latter mean- Pope for some special function. writers who, during any part of their Apostolic Fathers. - The Christian lives, apostles. There are five-Clement, Barwere contemporary with the nabas, Hermas, Ignatius, Polycarp.

APE'S HILL length, thus rendering these instruments exceedingly convenient for use. Sir W.

Herschel's 18-inch metallic speculum, used for examining the nebulæ and Milky Way, had a focal length of 20 feet; modern telescopes, with silvered-glass mirrors, have been constructed of the same aperture, but with a focal length of not more than seven feet.

Angular aperture (in microscopes), the amount of light transmitted by the objective, and, consequently, the distinctness of the image afterward magnified by the lenses forming the eye piece.

When an objective of the large angular aperture is employed, the more delicate markings of the object under examination, invisible when objectives of less angular aperture are used, are seen with great distinctness.

APE'S HILL (Arabic, Jebel Zatus), the ancient Abyla, the extremity of a mountain range in the N. of Morocco, opposite Gibraltar; one of the "Pillars of Hercules."

APHANIPTERA (af-an-ip'ter-a), an order of wingless insects, called by De Geer suctoria, and by Leach siphonaptera. They have a sucker of three pieces, and a true metamorphosis. The thorax is distinctly separated from the abdomen, and two horny plates mark the spots where in the higher insects wings would be. It contains the pulicidæ, or fleas.