Opus philosophie naturalis
Opus philosophie naturalis is a natural philosophy treatise printed in Brescia by Baptista Farfengo in 1490, a scholarly incunable compiled from works attributed to Albertus Magnus and Giles of Rome for university readers. Its pictures are woodcut diagrams: a circular wind-and-direction chart with dense block lettering, a profile head marking the three ventricles of the brain, and a printer's device with a cross, a hourglass, and initials in a diamond, useful for designers wanting early medical or cosmological diagram styles.


