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Donald S. Clark (standing) with students in the metallurgy lab
Wolfgang Panofsky, William Pickering, Russell Yost, Jr., Royal Sorensen
200″ mirror
200″ mirror
Electrical machinery shop
Josef Johnson at the 18″ Schmidt telescope
200″ disc on table of 200″ machine
200″ telescope at Palomar
Robert Millikan and GALCIT Aeronautics Faculty