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Donald S. Clark (standing) with students in the metallurgy lab
Wolfgang Panofsky, William Pickering, Russell Yost, Jr., Royal Sorensen
Wind tunnel class
200″ mirror
200″ mirror
Wind tunnel class--Naval Ensign Aeronautical Engineering Summer Course
Caltech military meteorology class
Electrical machinery shop
Josef Johnson at the 18″ Schmidt telescope
200″ disc on table of 200″ machine
200″ telescope at Palomar