Doctor Examining a Flask before a Patient within a Uroscopy Wheel (detail), from To Judge the Color of Urine (and of the Pulse), unknown artist. History and Special Collections Division for the Sciences, UCLA Library Special Collections
Galenic humor chart as it relates to astronomy. During the medieval period, people believed that illness was caused by disturbances in the "humours" of the body. Also utilized was astrology- how the environment and stars contributed to health.
The Harmonograph A harmonograph is a mechanical drawing device that shows the relationship between weight intervals. The vibrating frequency of an object has a direct connection with its physical proportions.
A image of a urine wheel from the 1500 edition of the rare medical textbook Fasciculus medicinae. Each section describes how urine should look at each stage of digestion. Medical practitioners can then colour in the glass to match it to the description.