N. Valois, Guillaume d’Auvergne, Paris, 1880, p. 308 note, says, “Il parait impossible de ne pas considérer cet ouvrage comme authentique.”
See also M. Steinschneider, Zum Speculum astronomicum des Albertus Magnus über die darin angeführten Schriftsteller und Schriften, in Zeitschrift für Mathematik und Physik, XVI (1871), 357-96.
[2290] am glad to see my view in this regard confirmed by Steele (1920), 267, who says: “It has been suggested that this tract was written by Bacon, but no one with an ear for style could accept the suggestion for a moment.”
[2291] Amplon. Quarto 377, first half of 14th century, fols. 25-36, Tractatus de iudiciis astrorum Aristoteli attributus. “Incipit liber quidam de iudiciis qui ab Alberto in Speculo dicitur esse Aristotelis et primo de nativitatibus.”
[2292] Denifle (1886), p. 236.
[2293] BN 7337, p. 45, “albertus commentator in suo speculo dixit quod predicte ymagines sunt mere naturales sicut recepte medicine.”
[2294] Schum (1887), pp. 785-867, Math. 29, “Speculum mathematicum Alberti Magni”; Math. 69, “Speculum domini Alberti de libris mathematicis.”
[2295] See Appendix I.
[2296] Petrus de Alliaco, Tractatus de ymagine mundi ... and other treatises by both d’Ailly and Gerson, printed about 1480 (numbered IB.49230 in the British Museum).
In the Elucidarius, cap. 2, d’Ailly cites “Albertus Magnus in suo speculo” two or three times. In the Vigintiloquium de concordantia astronomice veritatis cum theologia, he says, “Unde Albertus Magnus perutiliter etiam tractatum edidit in quo vere astronomie et artis magice libros per eorum principia et fines distinxit.” In the Apologetica defensio astronomice veritatis he cites “Albertus Magnus utique philosophus, astronomus, et theologus” concerning Albumasar’s placing the birth of Christ under the sign Virgo, a passage alluded to in the Speculum, but not, as far as I have noted, in Albert’s other works.