Ioannis de Sacrobusto libellus de sphaera
Subtitle: accessit eiusdem autoris computus ecclesiasticus, et alia quaedam in studiosorum gratiam edita
By: cum praefatione Philippi Melanthonis
Contributors: Krafft, Johann, -1578, printer; Crato von Crafftheim, Johannes, 1519-1585, printer; Melanchthon, Philipp, 1497-1560; Reinhold, Erasmus, 1511-1553
Publisher: Apud Iohannem Cratonem
Published: 1550
Place of publication: Impressum Vuitebergae
Language: lat
Number of pages: 272
Subjects: Astronomy; Early works to 1800; Church calendar; Calendar; Church year
Other titles: Ioannis De Sacrobvsto Libellvs De Sphæra; Joannis De Sacrobusto Libellus De Sphaera; Libellus de Sphaera; Libellvs de Sphaera; Themata qvae continent methodicam tractationem de horizonte rationali.
Work titles: Sphaera mundi
Notes: Imprint from colophon.

Title vignette: Armillary sphere.

The "Computus Ecclesiasticus" has special t.p.: Libellus Ioannis De Sacro Bvsto, De Anni Ratione, seu vt Vocatur Vulgo Computus Ecclesiasticus, cum praefatione Philippi Melanthonis. Anno. M.D.XLV.

"Themata Quae Continent Methodicam Tractationem de Horizonte rationali ... Quibus adiecta sunt paucula de umbris," leaves [270]-[272], signed: Autore Erasmo Reinholdo Salueldensi.

Some of the diagrams have movable parts.

Signatures: A-R⁸ (leaves R7 and R8 blank).

Rare Book copy: Bound with: Sacro Bosco, Joannes de. Libellus de sphaera. 1558.