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|All Authors / Contributors:||
Joannes de Sacro Bosco; Gherardo, da Cremona
|Notes:||Titles from p. ,  (incipits, printed in red).
The Theorica planetarum is usually considered to be by the Cremona astrologer Gherardo da Sabbioneta, although some authorities ascribe it to the Gerardus Cremonensis who died 1187. Cf. Dict. of scientific biog., suppl., p. 189 for a summary of the evidence.
Both works were first printed in 1472. Cf. The awakening interest in science during the first cent. of printing / Margaret Bingham Stillwell. no. 63, 70.
Imprint from colophon.
Signatures: a-b⁸ c-d⁶ e-f¹⁰.
LC copy: paragraph marks in red (original printed black paragraph marks overpainted, and new marks added elsewhere); ill. hand-colored; marginalia throughout first work; ownership inscriptions on p. : Fr[atr]is Bernardini minimi, and Bibliothecae [co]nventus Romani S. Andreae de Traisis (a third, a personal name, is undecipherable). St. Andreas was an Augustinian monastery in Austria; cf. Cottineau, column 2586.
|Description:|| p. : diagrams (woodcuts) ; 19 cm. (4to)|
|Contents:||Johannes de Sacro Bosco. Sphaera mundi, a1r-d6r; Gerardus Cremonensis. Theorica planetarum, e1r-f10v; colophon, f10v; P[escennius] Franciscus Niger, Verse addressed to the reader, f10v.|
|Other Titles:||Spera mundi.