The Urine Wheel for diagnosing metabolic diseases, from Epiphanie Medicorum by Ullrich Pinder in 1506 (via The Urine Wheel | Oscillator, Scientific American Blog Network)

The Urine Wheel for diagnosing metabolic diseases, from Epiphanie Medicorum by Ullrich Pinder in 1506 (via The Urine Wheel | Oscillator, Scientific American Blog Network)