Mrs. Kleitman was present to greet Dr. Kleitman upon his arrival from the cave, a subsequent banquet followed, 1938
Mammoth Cave National Park; National Park Service
Mrs. Kleitman was present to greet Dr. Kleitman upon his arrival from the cave, a subsequent banquet followed, 1938
Mammoth Cave National Park; National Park Service
Mrs. Kleitman was present to greet Dr. Kleitman upon his arrival from the cave, a subsequent banquet followed, 1938
Mammoth Cave National Park; National Park Service
Publicity photo, sleep study, Kleitman and Richardson
Mammoth Cave National Park; National Park Service
Cave, Kleitman and Richardson experiment, publicity photographs
Mammoth Cave National Park; National Park Service
Cave, Kleitman and Richardson sleep study, publicity photographs
Mammoth Cave National Park; National Park Service
Cave, going through their daily routine of washing, Dr. Kleitman pours water for Mr. Richardson, 1938
Mammoth Cave National Park; National Park Service
Cave, Dr. Kleitman reads a register while Mr.Richardson sleeps in their study of sleep, 1938
Mammoth Cave National Park; National Park Service
Dr. Kleitman and Mr. Richardson leaving Mammoth Cave after spending 33 days there in the study of sleep, 1938
Mammoth Cave National Park; National Park Service
Dr. Kleitman and Mr. Richardson leaving Mammoth Cave after spending 33 days there in the study of sleep, 1938
Mammoth Cave National Park; National Park Service
Dr. Kleitman and Mr. Richardson leaving Mammoth Cave after spending 33 days there in the study of sleep, 1938
Mammoth Cave National Park; National Park Service
Dr. Kleitman and Mr. Richardson leaving Mammoth Cave after spending 33 days there in the study of sleep, 1938
Mammoth Cave National Park; National Park Service
Cave, the two scientists, Dr. Kleitman and Mr. Richardson, Chicago University physiologists, have dinners in their underground repose, 1938.
Mammoth Cave National Park; National Park Service
Cave, the two scientists from University of Chicago, Bruce Richardson at left and Dr. Kleitman at right at study, 1938
Mammoth Cave National Park; National Park Service
Cave, the two scientists from University of Chicago, Bruce Richardson at left and Dr. Kleitman at right at study, 1938
Mammoth Cave National Park; National Park Service
Party entering Mammoth Cave with newsreel cameraman to greet the two scientists, Dr. Kleitman and Mr. Richardson, making study of sleep, 1938
Mammoth Cave National Park; National Park Service
Cave, a waiter from hotel bringing lunch and mail to scientists Dr. Nathaniel Kleitman, left, and Bruce Richardson, undergoing experiments in sleep in Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Flares used for lumination in making newsreel of Dr. Kleitman and Mr. Richardson, University of Chicago scientists making a study of sleep in Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Party that went in cave with newsreel cameraman to greet the two University of Chicago scientists, Dr. Nathaniel Kleitman and Mr. Bruce Richardson making a study of sleep in Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Upon reaching the surface and the 76 degree temperature, Dr. Kleitman and Mr. Richardson find it necessary to remove part of their clothing they wore in the 54 degrees of the cave, 1938
Mammoth Cave National Park; National Park Service
Generously Supported By
