sixteenth century edition of Sacrobosco's De Sphaera in the Whipple Collection. from http://www.hps.cam.ac.uk/starry/sacrobookslrg.jpg at http://www.hps.cam
opusculum, gedruckt von Erhard Ratdolt, Venedig 1485 Diagram, showing eclipse of the moon; woodcut, printed in three colours, from Sphaericum opusculum