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Physiologist Washing Their Hands

(Original Caption) More than a month of continuous living in an underground room in Mammoth Cave was one of the hardships under taken by two university of Chicago physiologist to determine how easily man could adjust himself to a cycle of living different from the 24 hour day common to everyonr on the surface of the earth. Since June 4, they have been living on a 28 hour cycle, or a six-day week. The man are Dr. Nathaniel Kleitman and his assistant, Bruce Richardson. They expected to come up to the surface shortly. The men arise in the "morning" Richardson (left), washes, while Dr. Kleitman pours.
Physiologist Washing Their Hands
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Credit:
Bettmann / Contributor
Editorial #:
515163306
Collection:
Bettmann
Date created:
July 05, 1938
License type:
Release info:
Not released. More information
Source:
Bettmann
Object name:
u455909acme.jpg
Max file size:
4161 x 2937 px (13.87 x 9.79 in) - 300 dpi - 6 MB