Domenico Martinelli, Horologi Elementari, Divisi in quattro Parti, Venetia, 1669, 16 plates engraved by Marco Bragadino, vellum cover, an unusual work, describing various methods of 'elemental clocks', i.e. clocks set going by earth, air, fire and water some of which could be made to show the time of day, the days of the week and month and the course of the moon and planets etc.