Ophthalmoscope. Cylindrical handle attached to rotating disk; disk includes numbers from 8 to 23; small light bulb and metal attachment in case; case is leather and velvet lined. Case marked: "DeZeng-Standard Co. -- Camden, N. J". Ophthalmoscope marked: "DEZENG STANDARD CO. -- MAKERS- CAMDEN N.J. -- PATENTED -- JAN. 19. 04".
Contributor:
De Zeng-Standard Co (Camden, New Jersey)
Contributed By:
University of Minnesota Libraries, Owen H. Wangensteen Historical Library of Biology and Medicine.
