PORTIUS, Simon. De rerum naturalium principiis libri duo, Naples: Giovanni Maria Scoto, 1561, 4°, woodcut printer's device on title (erasure of signatures on title causing slight loss, occasional light spotting), contemporary limp vellum. [Adams P1964] -- Muzio ODDI. De gli horologi solarinelle superficie piane, Milan: Giacomo Lantoni, 1614, 4°, woodcut title vignette, full-page woodcut coat-of-arms and 61 woodcut diagrams in text (occasional marginal wormholing and staining), contemporary vellum (lacks ties, upper inner hinges split). With 3 other works on horology. (5)