A box with an end panel that can open and close to reveal/conceal a circular opening, from the opposite end of the box projects a telescopic instrument.
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. 176.; See related catalog record: 2429033R