[2603] Spec. astron. cap. 7. More fully the Incipit is, “Rogatus fui quod manifestem consilia philosophorum....”
[2604] Digby 68, 14th century, fols. 124-35, Liber Alkindii de impressionibus terre et aeris accidentibus. CU Clare College 15 (Kk. 4, 2), c. 1280, fols. 8-13, “In nomine dei et eius laude Epistola Alkindi de rebus aeribus et pluviis cum sermone aggregato et utili de arabico in latinum translata.”
Steinschneider (1906) 32 gives the title as De impressionibus aeris, and suggests that it is the same as a De pluviis or De nubibus, which seems to be the case, as they have the same Incipit—Steinschneider (1905) 13—as does a De imbribus in Digby 176, 14th century, fols. 61-63. Steinschneider also suggested that BN 7332, De impressionibus planetarum was probably the same treatise; and this is shown to be true by the Explicit of Alkindi’s treatise in another MS, Cotton Appendix VI, fol. 63v, “Explicit liber de impressionibus planetarum secundum iacobum alkindi.” See also BN 7316, 7328, 7440, 7482.
The opening words of an anonymous Tractatus de meteorologia in Vienna 2385, 13th century, fols. 46-49, show that it is the Alkindi. A very similar treatise on weather prediction, De subradiis planetarum or De pluviis, is ascribed to Haly and exists in three Digby MSS (67, fol. 12v; 93, fol. 183v; 147, fol. 117v) and in some other MSS noted by Steinschneider. It belongs, I suspect, together with a brief Haly de dispositione aeris (Digby 92, fol. 5) which Steinschneider listed separately.
[2605] Some notion of the number of these astrological treatises on the weather may be had from the following group of them in a single MS.
Vienna 2436, 14th century, fols. 134-6, “Finitur Hermanni liber de ymbribus et pluviis”
136-8, Iohannes Hispalensis, Tractatus de mutatione aeris
139, Haomar de pluviis
139-40, Idem de qualitate aeris et temporum
140, de pluvia, fulgure, tonitruis et vento