A box with two openings (lenses?) to demonstrate the perception of light.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)
Related Title(s):
Is part of: Oculus artificialis teledioptricus; sive, Telescopium, ex abditis rerum naturalium & artificialium.., part 1, p. 126.; See related catalog record: 2429033R