| Johann Zahn [Properties of light when passed through an opening] 1685-1686 Book illustration NIH: U.S. National Library of Medicine (NLM) Record UI: 101449186 LL/54734 Johann Zahn, 1685-1686, Oculus artificialis teledioptricus; sive, Telescopium, ex abditis rerum naturalium & artificialium.., (Herbipoli: Quirini Heyl), part I, p. 99.
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