تفاصيل

Three technicians with Zeiss Projector parts

APHP.S10.F3.1

Three Adler technicians are working on the Zeiss Projector. An older gentleman and two young men, (left to right) Frederick O'Callaghan, Curt Richter, and Bert C. McKeena, are putting together a part of the Zeiss. The parts are laid out.

One 4 x 5 inch black and white print

Zeiss projector, Adler Planetarium & Astronomy Museum -- Staff

Frederick O'Callaghan, Curt C. Richter, Bert C. McKenna

graphic material

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