Links to useful resources:

General information on Circa instans:

http://blog.wellcomelibrary.org/2017/02/a-medieval-medical-bestseller-the-circa-instans/

Resources for science and medicine:

Apothecaries’ symbols in medical texts: https://textcreationpartnership.org/docs/dox/medical.html

Motherby, G. A new medical dictionary, or general repository of physic (1887). https://archive.org/details/b28406989