File:Bartholomew of Messina, Problemata (Mich. Ms. 203).jpg

Summary
Bartholomew of Messina, trans. Problemata physica (Mich. Ms. 203; 14th century, England). The red dragon is probably a reference to dragon's blood, thought at the time to have medicinal properties.

Source: https://exhibitions.kelsey.lsa.umich.edu/art-science-healing/zoom/medieval_manuscripts6.jpg