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A small cosmic-ray shower of positive and negative electrons (7900 gauss magnetic field)
Excavation for Crellin
Construction of Kerkchoff Labs
Grad students
William Fowler with a group of students
Excavation for Crellin
Fritz Zwicky at the 18″ Schmidt telescope at Palomar Observatory
Very early JPL buildings
Construction of Kerckhoff Labs
pH meter, Model G
Traveling wave tube
Ion chamber
pH meter, Model M