Libra astronomica, y philosophica : en que D. Carlos de Siguenza y Gongora, cosmographo, y mathematico regio en la Academia Mexicana, examina no solo lo que a su manifiesto philosophico contra los cometas opuso el R. P. Eusebio Francisco Kino de la Compania de Jesus; sino lo que el mismo R. P. opino, y pretendio haver demostrado en su exposicion astronomica del cometa del año de 1681. Sacala à luz D. Sebastian de Guzman y Cordova, fator, veedor, proveedor, iuez oficial de la Real Haceinda de Su Magestad en la caxa desta corte
A 1690 Mexican astronomy treatise by Carlos de Sigüenza y Góngora, printed in Mexico City by the heirs of the widow of Bernardo Calderón and aimed at scholars and the learned public of colonial New Spain. Its pictures are small text-set diagrams and decorative type: a geometric parallax sketch with a circle, a tangent line and lettered points, a large ornamented initial letter, and dense pages of columned Spanish type with a headed section. A designer could draw on the sparse line diagram for labelled geometric schematics and the floral woodcut initial for ornamental drop caps.
