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CLAVIUS, Christoph (1537-1612). Romani calendarii a Gregorio XIII. P.M. restituti Explicatio S.D.N. Clementis VIII. P.M. iussu edita. Rome: Aloysius Zanettus,1603.
2° (349 x 220). Arms of Clement VIII on title, letterpress tables, some with border of printer’s flowers, xylographic ornaments. (Cockling, browning and spotting, 3B6 and 3I2 with tear into bottom lines of text and old marginal repair, small hole in colophon leaf, without final blank.) Contemporary flexible vellum with manuscript paper spine labels (spine soiled and repaired, covers somewhat discoloured, lacks front free endpaper). Provenance: Jesuit college at Forolini (inscription on title).
FIRST EDITION of Clavius’s foundation work on the Gregorian calendar. This had been adopted in Catholic countries in 1582 after his own proposals for reform, based on Reinhold’s ‘Prussian Tables’, had been accepted by the Pope. Necessitating the loss of ten days in October 1582, the calendar met with considerable opposition from scientists such as Viète and Scaliger and from the protestants. RARE AT AUCTION. BL/STC 17th-century Italian I, p.240; Honeyman 717.
2° (349 x 220). Arms of Clement VIII on title, letterpress tables, some with border of printer’s flowers, xylographic ornaments. (Cockling, browning and spotting, 3B6 and 3I2 with tear into bottom lines of text and old marginal repair, small hole in colophon leaf, without final blank.) Contemporary flexible vellum with manuscript paper spine labels (spine soiled and repaired, covers somewhat discoloured, lacks front free endpaper). Provenance: Jesuit college at Forolini (inscription on title).
FIRST EDITION of Clavius’s foundation work on the Gregorian calendar. This had been adopted in Catholic countries in 1582 after his own proposals for reform, based on Reinhold’s ‘Prussian Tables’, had been accepted by the Pope. Necessitating the loss of ten days in October 1582, the calendar met with considerable opposition from scientists such as Viète and Scaliger and from the protestants. RARE AT AUCTION. BL/STC 17th-century Italian I, p.240; Honeyman 717.
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