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200" disc loaded on railway car
Drawing of Edward Simmon's original invention--a new type of tension dynamometer
Trustees of Marine Biological Lab, Woods Hole, MA 
George Beadle and Boris Ephrussi using microscopes
Excavation for Crellin
World war 1: Throop ROTC
Tandem Accelerator
Caltech class of '49
Dish construction
Lee DuBridge with Edmund G. (Pat) Brown in the background
Aerial view of the campus during the construction of Beckman Institute
Aluminizing chamber on south grade
Polar axis of the 48” Schmidt telescope
Coach Smith at the Faculty-Senior baseball game
Martian surface in the Chryse area
Aerial view of the campus as seen from the south
East Hall
Jean Perrin (at Nils Perrin)
Scripps-Caltech Conference
Seth Nicholson with telescope

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