The x-ray apparatus consists of a lead box, a calcite crystal, and an electrometer. An x-ray would come out of the lead box, hit the calcite, and be detected by the electrometer.
The photo depicts Carl Cori, winner of the 1947 Nobel Prize in Physiology and Medicine, Joseph Erlanger, winner of the 1944 Nobel Prize in Physiology and Medicine, Gerty Cori, winner of the 1947 Nobel Prize in Physiology and Medicine, and Arthur…