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Hallowell Davis examining a brain wave graph.

The photograph was originally published in the October 18, 1937 issue of LIFE magazine. Typed caption underneath the photograph reads: "Tape record on which brain waves are recorded is here being observed by Dr. Davis in the control room. The caliper in his right hand measures the wave frequency. Two hairlike pens trace record of brain waves. Third pen making straight line at top of tape shows exact time when a signal is given, reords subject's speed of reaction."

Allen Davis sleeping in an experimental cubicle.

The photograph was originally published in the October 18, 1937 issue of LIFE magazine. Typed caption underneath the photograph reads: "Allen Davis sleeps in the experimental cubicle while his brain waves are recorded in another room, 60 ft. away. Since Dr. Davis started his experiments in 1935, Allen has been a frequent subject. Not at all apprehensive, he enjoys the experience, is quite willing to lend his brain to his father at all times. He can talk to his father through the microphone hanging above the bed. The cubicle is screened with copper wiring to eliminate any stray electrical currents."

Drawing of the St. Louis Medical College anatomy ampitheater, St. Louis, Missouri, circa 1952.

Handwritten note on the back of the photograph by Robert J. Terry identifies the location of the drawing as the Missouri Medical College "McDowell's College" which is incorrect. A subsequent note by M. Young identifies the location as St. Louis Medical College Ampitheater. The original pencil sketch of the St. Louis Medical College by Theodore Anders is held by the Becker Library Archive in VC610.

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