Nouiciis adolfscentibus ad astronomicam rempu. capessenda[m] aditu[m] i[m]petra[n]tib[us], per breui rectoq[ue] tramite a uulgari uestigio semoto, Ioannis de Sacro Busto Sphe̜ricum opusculu[m] Georgiiq[ue] Purbachii I[n] mot[us] planetaru[m] accuratiss. theorice̜ Necno[n] contra Cremonensia in eorunde[m] planetaru[m] theoricas delirame[n]ta Ioa[n]nis de Mo[n]te Regio disputatio[n]es ta[m] accuratiss. q[uam] utiliss. dicatu[m] opus utili serie contextu[m] inchoat.

Title from incipit on leaf 1₂. Imprint from Incunabula short title catalogue. Colophon (leaf 7₁₀ verso) reads: Impressum est hoc opusculum mira arte & diligentia Erhardi Ratdolt Augustensis. Anno salutifere̜ incarnationis, 1485. Signatures: 1-6⁸ 7¹⁰. Chancery quarto; 1₇ recto: 32 lines, 146 x 101 mm; types: 91R (text), 76G (table on last page), 65G (inscriptions on earlier diagrams, 56 (75)G (inscriptions on frontispiece and later diagrams); printed initials, diagrams. Large woodcut of armillary sphere as frontispiece (leaf 1₁ verso); woodcut initials. Seven of the diagrams in Peurbach's Theoricae novae planetarum are printed in color (red, black, yellow, and brown); leaf 5₃v (p. [71]) contains the tri-color eclipse diagram. Goff, F.R. Incunabula in American libraries, J406 Catalogue of books printed in the XVth century now in the British Museum, V, 290 (IA. 20546) Incunabula short title catalogue, ij00406000 COPY NOTE: Boston Public Library (Rare Books Department) copy Q.405.108 leaf dimensions: 184 x 135 mm. PROVENANCE: Boston Public Library (Rare Books Department) copy Q.405.108 purchased from Maggs in April, 1939. BINDING: Boston Public Library (Rare Books Department) copy Q.405.108 bound by the Leighton firm, of London, in umber morocco panelled and tooled in blind. Spine ruled in blind with title stamped in gilt.