Diagrams on perspective and optics in Po-wu hsin-pien: Part 1: ch'u-chi (textbook on natural sciences)

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Diagrams on perspective and optics in Po-wu hsin-pien: Part 1: ch'u-chi (textbook on natural sciences). Wellcome Collection. Source: Wellcome Collection.