De cometis libelli tres : I. Astronomicvs, theoremata continens de motu cometarum, vbi demonstratio apparentiarum & altitudinis cometarum qui annis 1607. & 1618. conspecti sunt ... II. Physicvs, continens physiologiam cometarum nouam ... III. Astrologicvs, de significationibus cometarum annorum 1607. & 1618
Johannes Kepler's three-part treatise on comets, printed in Augsburg in 1619 by Andreas Aperger for the bookseller Sebastian Mylius, covering the comets of 1607 and 1618 in astronomical, physical and astrological terms. The pictures are four repeated printed headpieces of a symmetrical scrolled ornament, a shield-like panel of looping tendrils, spiralling stems and small leaf forms, with variations in wear and inking that a designer could use as a dense, mirrored border or corner motif.
