2 images. California Institute of Technology Jet Propulsion Laboratory ... 70 acres & buildings ...Time shots of 800,000 volt impulse flashing over seven insulators, 11 March 1952.; Caption slip reads: "Photographer: Richardson. Date: 1952-03-10. Reporter: Swaim. Assignment: Caltech high voltage lab. K19, 20: Time shots of 800,000 volt impulse flash over string of seven insulators, This is part of electrical engineering research in Caltech's high potential research laboratory. K17, 18: Caltech's jet propulsion laboratory, from east bank of Arroyo Seco, 1/2 mile north of Devil's Gate Dam, showing entire 70 acres and buildings used in US Army jet research".