Commentariorum in astrolabium, quod planispherium vocant, libri sex nunc primùm in lucem editi.
Paris, Michel Vascosan, 1551. *** Rojas describes two new types of astrolabe that he developed using an orthographic projection of the celestial sphere. Illustrated by 60 woodcuts. "The chief novelty in both [astrolabes] consisted in a special treatment of the face of the instrument as an orthographic projection of the..... More