In the fall of 1937, Ed Keefer was a senior in the school of engineering at the University of Toledo in Ohio. Tall, slender, and bespectacled, Keefer was the president of the calculus club, the vice-president of the engineering club, and a member of the school’s exclusive all-male honor society. He also invented the Cupidoscope. The electrical device could not have been more perfectly designed to bring campus-wide fame to its creators, Keefer and his less sociable classmate John Hawley. It promised to reveal, with scientific precision, if a couple…
