Tractatum de spera quatuor capitulis distinguimus ... [Theorica planeta[rum]].
Contributors: Gherardo, da Cremona, 1113 or 14-1187.; Gherardo, da Sabbioneta, 13th cent.
Publisher: Florentius de Argentina
Published: 1472
Place of publication: [Venice
Language: lat
Number of pages: 84
Subjects: Astronomy -- Early works to 1800.
Other titles: Theorica planetarum.
Notes: Goff J-400
Hain-Copinger 14106
Titles from opening lines on p. 1 and explicit on p. [81].
The Sphaera mundi is by Joannes de Sacro Bosco. 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.
Possibly the 1st printed edition. Cf. The awakening interest in science during the first cent. of printing / Margaret Bingham Stillwell. no. 63, 70.
Imprint from Goff.
This version of the two texts makes reference to diagrams which are not printed with the texts, leaving blank spaces for them.
Signatures: [1¹⁰ 2¹² 3-4¹⁰].
LC copy: the 1st diagram space is filled in, in ink; the others remain blank. Paragraph marks in alternating red and blue; capitals in alternating red and blue with penwork of the opposite color. Capitals on 1st page of each work in magenta, blue, green, white, and gold. Inscription on p. 84: Hic liber est mei Antonij Vitellij, artib[us] stude[n]ti [sic], que[m] emi Venetijs 7em [libris (= lire)] die 8[v]o Madij 1472. Bookplate of Hans Rosenberg.