formula, fixing the date of the forgery at the period of the Arian controversy, somewhere between A.D. 340 and A.D. 350 (§ 50, 2).--The =eighth book= is in great part an unmistakeable forgery compiled from older sources belonging to the 3rd century, some of which are still to be found, and forms a handbook for the discharge of clerical, especially episcopal, duties in the conducting of worship and other clerical functions, _e.g._ ordination, baptism, etc., together with the relative liturgical formularies, drawn up in a thoroughly legal-like style, in which the Apostles one by one give their contribution with the formula Διατάσσομαι. The composition is probably ante-Nicene, but the date of its incorporation with the other seven books is uncertain.--In most, though not in all, MSS. the =Canones Apostolorum=, sometimes 50, sometimes 85, in number, are appended to the eighth book as its last chapter. Their standpoint is that common to the canons of the early councils from which they are chiefly borrowed. In respect of contents they treat mainly of the moral behaviour and official functions of the clergy. The 85th contains a Scripture canon of the Old and New Testaments, including the two Epp. of the Roman Clement (§ 30, 3), as well as the Apost. Constitutions, but omitting the Apocalypse of John (comp. § 33, 9). The collection of the apostolic canon cannot have been made before the beginning of the 5th century, and most likely in Syria. Dionysius the Little admitted only the first 50 as _Canones qui dicuntur Apostolorum_, but Johannes Scholasticus quite unhesitatingly ascribes all the 85 to Clement of Rome. The Second Trullan Council in A.D. 692 (§ 63, 2) acknowledged the genuineness of the 85, but rejected the Apostolic Constitutions as a heretical forgery which had found no general acceptance in the West.--While hitherto it has been surmised that the 7th bk. of the Apost. Constit., as an independent and original work, should be assigned to another and a much later author than the first six bks., Harnack, founding upon his study of the Didache, has come to a clear understanding of their mutual relations. He shows that the original documents lying at the basis respectively of the Didache and the Didascalia are fundamentally distinct in respect of composition and character, but the two in the form in which they lie before us in the Apost. Constit. are undoubtedly the work of one and the same interpolator. We further obtain the equally convincing and surprising result that the author of this forgery is also identical with the author of the =thirteen Pseudo-Ignatian Epistles= (§ 30, 5), and had in the one case and in the other the same object in view. Finally, he characterizes him as a Syrian cleric well versed in Scripture, especially the Old Testament, but also a shrewd worldly politician, opposed to all strict asceticism, who sought by his forgeries