Cartagena: En la Oficina de Marina de este Departamento, 1796. Two volumes bound in one. ,84pp. plus two folding engraved plates; ,159pp. plus four folding engraved plates. Folio. Contemporary calf, mottled and stained, spine gilt. Spine slightly worn. Titlepages slightly soiled. Occasional minor dampstaining and age-toning, otherwise internally fresh and clean. A very good copy. Item #WRCAM37756
A sammelband of two very rare late 18th-century Spanish illustrated technical treatises, both written expressly for the Marine-Guards. Instructions for the binder on page  of the first title regarding the placement of the engraved plates for the two treatises indicate that it was expected that the two titles would often be bound together. The two scientific texts, concerned with spherical trigonometry and cosmography, are detailed, highly technical, and intended for students with a strong background in mathematics, astronomy, and geography. Printed by the Office of the Navy in Cartagena, the texts were to provide mariners the solid theoretical grounding needed for successful navigation. Ciscar, the Director of Studies of the Academy for Marine-Guards in the Department of Cartagena, was the author of several other works on mathematics, astronomy, and navigation. Extremely rare, neither title in OCLC, NUC, or the pre- 1955 BRITISH MUSEUM CATALOGUE. PALAU 54961, 54960. NAVARRETE, p.527 (both titles). ENSAYO DE BIBLIOGRAFÍA MARÍTIMA ESPAÑOLA 1253 (TRATADO DE TRIGONOMETRÍA... only).