Cosmographiæ introductio : cum quibusdam geometriæ ac astronomiæ principijs ad eam rem necessarijs
Cosmographiae introductio is a 1537 Venetian cosmography textbook by the German mathematician Peter Apian, printed in Venice for a learned readership of students of astronomy and geometry. Its woodcut diagrams show armillary spheres, a sundial-like device with a shadow gnomon, and an axis-and-meridian sphere drawn in plain black line with red accents. A designer could take from them the clean, schematic logic of early scientific diagrams, with bold circles, labelled axes, and simple hand-coloured accents.
