3208. Almageste; Arab. almajistī; from al, the, and majistī, for Gk. μεγίστη;, short for μεγίστη σύνταξις, 'greatest composition,' a name given to the great astronomical treatise of Ptolemy; hence extended to signify, as here, a text-book on astrology. See Hallam, Middle Ages, c. i. 77. Ptolemy's work 'was in thirteen books. He also wrote four books of judicial astrology. He was an Egyptian astrologist, and flourished under Marcus Antoninus.'—Warton. See D. 182, 325, 2289. And see my note to Chaucer's Astrolabe, i. 17; vol. iii. p. 354.
3209. See Chaucer's own treatise on The Astrolabe, which he describes. It was an instrument consisting of several flat circular brass plates, with two revolving pointers, used for taking altitudes, and other astronomical purposes.
longinge for, suitable for, belonging to.
3210. augrim-stones, counters for calculation. Augrim is algorism (see New Eng. Dict.), or the Arabic system of arithmetic, performed with the Arabic numerals, which became known in Europe from translations of a work on algebra by the Arab mathematician Abu Ja'far Mohammed Ben Musa, surnamed al-Khowārazmī, or the native of Khwārazm (Khiva). Chaucer speaks of 'nombres in augrim'; Astrolabe, i. 9. 3.
3212. falding, a kind of coarse cloth; see note on A. 391.
3216. Angelus ad virginem. This hymn occurs in MS. Arundel
248, leaf 154, written about 1260, both in Latin and English, and with musical notes. It is printed, with a facsimile of part of the MS., at p. 695 of the print of MS. Harl. 7334, issued by the Chaucer Society. The first verse of the Latin version runs thus:—
'Angelus ad uirginemsubintrans in conclaue,
Virginis formidinemdemulcens, inquit "Aue!
Aue! regina uirginumceli terreque dominum