By Elton Gish; posted August 24, 2011 View Original: Click to zoom, then click to magnify (1050 x 814) 387KB
Photo from the Huntington Digital Library (undated). There are 7 photos showing 96 different insulators tested. Southern California Edison Collection of Photographs, Courtesy of the Huntington Library, San Marino, California.
[id=318796865]
