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Vintage photos of:
1936. Camden, New Jersey. "RCA Victor Final Inspector -- testing radio frequency alignment and making final test of chassis. This takes place in a room entirely surrounded by copper screening in order to protect testing from any interference. This is the job requiring the highest skill. Even technical training, such as an electrical engineering course, must be supplemented by a course of training at the plant for this particular work." Photo by Lewis Hine. View full size.
UPDATE: Our subject is Dr. James Harris Rogers (1856-1929) of Hyattsville, Md., inventor of the "loop aerial" and holder of numerous patents in telegraphy, telephony and radio:
August 16, 1929. A Veteran Inventor. About 6 miles from Washington, on the edge of the little hamlet of Hyattsville, Md., may be found Dr. James Harris Rogers, wizard inventor, now 80 years old, retired from his work but still erect and energetic. It was Dr. Rogers who during the war proved that water as well as earth and air is a medium for the transmission of electro-magnetic waves. Through the "well" located on his property, high officials heard German official reports.
Radio apparatus and unidentified operator circa 1930 in this unlabeled Harris & Ewing plate. Who can help us fill in the blanks? View full size.