Excerpta ex Albatenio.
DE Epocharum distantiis, I find no such express mention in Albategnius, as that in the end of the 15 of Alfraganus, of Christman's Edition: nei∣ther are his 32 nor his 421 set down in the same method. The 325 (the Title whereof, in the Indice Capitum before the Book, is, In scientiâ Tarec Arabum & Romanorum ac Persarum atque Alkept alternatim) hath three parts.
In the first part are set down their 4 sorts of Months, thus. Mensium qui∣dem Arabum nomina sunt, Almuhartan, Saphar, &c. Romanorum autem men∣sium nomina secundùm Graecorum & Egyptiorum principia sunt, Elul, Tisrin primus, Tisrin Secundus, &c. Nomina verò mensium Persarum, sunt Efroso∣meth, Asdiasdmed, &c. Mensium autem Alkept nomina sunt Tut, Bena, Accur, &c.
Whereunto is subjoyned a Clause directly concerning your purpose, and that truly set down, amidst the manifold errors about the Dates of Times, both in the same Chapter, and in the whole Book, as appeareth by comparing the same with other places in these Words. Principium autem à quo Romani inci∣piunt & Alkept, est à morte Alexandri Macedonis secundum Graecos. Aegyptii verò & Romani ab Ehahilcarnain annis numerant, & sunt inter eos 12 anni Aegyptiaci. These are the very Words, and without doubt Albatenius his meaning, confirmed by the Dates of the most principal of his observations, and the plain truth. In the second part, he sheweth how to find the beginnings of all those 4 sorts of Years and Months. Where the Arabian and Alhegira radix, is, 5d. The Roman from Alhilcarnain, 1 1.1 is 0d. 7d. The Persian from Jesdag, 3d. The Alkept also from Adhilcarnain, 5d. Whereby is signified that the first year of Dhilcarnain began in the 436 year of Nabonazar, and 12 à morte Alexandri, almost ending, to wit, on the 8d. 2 1.2 Of Tisrin posterioris, or November following. In the 3. he sheweth how to find one sort of year by another, and it hath 8 Sections.
1. Romanorum, i. e. Syre-Graecorum & Constantinopolitana, à die Septembris feria 7a, anni periodi Julianae 4402. [ab initio Octobris alii Arabes exteri Antiochiam deducunt; ut à 1o Tisri Hebraei in suâ aerâ contractuum, & Jason Cyrenaeus in 2o. lib. Maccab.—vel 1o die Octobris (ejusdem anni) feriâ 22, ut apud Alfraganum, & alios Arabas, & Hebraeos in suo—.]
2. Alkept, Alexandrinorum, i. e. à 290 die Augusti feriâ, anni periodi Julianae 4403. ut aera Chaldaeorum apud Ptolęmaeum, & Laodicenorum apud Scalig. p. 405.
Nam Thoth Nabonass. 436. incurrit in Novem. 9. seria 5a. Thoth verò 437 (quod hic potius intelligendum, quia à 12 Alexandri dessnente sit supputatio) à Nov. ser. 6a.
§. 1. Si autem Romanorum Taric per Taric Alhegira scire volueris, ita ut diem Romani mensis in quo fueris, & quot ad Hilcarnaim anni praeterierint, deprehendas, Arabicam radicem servatam accipe, eique 317 dies superadde (viz. as many as are from the first of 3 1.3 Elul or September, to the 15 of 4 1.4 Themmur or Tamuz, that is, July)—quibus 933 superadde annos, collectumque erunt anni ad Hilcarnaim. This confirms the former account; for being granted that there are 945 years inter Philippum sive mortem Alexandri, & Hegiram, take away 12, there remain 933 between Dhilcarnaim and Hegira.