Figure 3

1962 Class of the Summer Course. Field trip to the Veterinary School at College Station, Texas A&M. Upper frame: Preparing the animal. LaNelle E. Nerger at the far left. Middle frame: Dr. Geddes probably attaching electrodes to the unanesthetized equine. Lower frame: Max Val performing the old Chauveau-Marey maneuver, that is, via the rectum, manually compressing the abdominal descending aorta to elicit heart slowing by vagal response. This maneuver led 10 years later to the Nightingale Prize mentioned in the text.