Harley MS 80, ff 58r-74v, ff 58r-68r

Zael (Sahl ibn Bishr al-Isra'ili), De interrogationibus or Liber introductorius ad astrologiam.

Rubric 'Capitulum primum / principium consi/deracionis in rebus / quod est ascendens', incipit: 'Cum interrogatus fueris de aliqua interrogatione', explicit: 'destinetur omne quodam pertinet ad eandem domum et omnes / res eius. Explicit'. A marginal note in the upper margin of f. 58r 'questiones et elecciones zahel precij xiij s. iiij d'.

The text is mentioned by Albertus Magnus in the chapter 9 of his Speculum astronomiae: see A. Borgnet, Alberti Magni Opera Omnia, ex editione lugdunensi religiose castigata (Paris, 1891), X p. 639. The text was printed with Ptolemy, Quadripartitum, in Venice, by Ratdolt in 1484 and by Locatellus in 1493 (see Klebs, Incunabula scientifica et medica (Hildesheim, 1963), nos. 814.1 and 2). For the text see F. J. Carmody, Arabic Astronomical and Astrological Sciences in Latin Translation (Berkeley, 1956), p. 41. For manuscript copies of the original works in Arabic see F. Sezgin, Geschichte des arabischen Schrifttums (Leiden, 1979), VII, pp. 125-128.

Decoration:

Spaces left blank for initials with small guide-letters throughout. Interlinear and marginal headings underlined in red, paragraph initials touched in red, paragraph marks in red.