Fire prevention (fire school), proper inspection and use of cutting rakes and hoes, being given by Mr. Cook, Deputy Chief Forester to fire school attendents
Mammoth Cave National Park; National Park Service
Green River, caterpillar and bulldozer moving dirt, rock at Green River Ferry so ferry can land, river is so low ferry could not land, 1939
Mammoth Cave National Park; National Park Service
Looking east up Bylew Creek valley from top of chimney stack rock, pine grove in foreground, Bylew Creek is in maximum boundaries of park
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
View of Mammoth Cave National Park project looking toward Green River from the south side of Indian Hill, farm in foreground belongs to Columbus James
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
Demonstrating correct manner of grasping file in "touching up" axes in the field, note cleat tacked to side of tool box as an improvised vise, 1938
Mammoth Cave National Park; National Park Service
Cave wars, solicitors for Great Onyx Operating Committee at work, a man standing and a woman seated at a desk waiting, at building beside road
Mammoth Cave National Park; National Park Service
Old colored quarters near Mammoth Cave Hotel which is to be razed because of its undesirable structure, colored employees will be housed in new quarters, 1939
Mammoth Cave National Park; National Park Service
An example of healing over a bark tracing, tree No. 82, Mammoth Cave Hotel and cabin group No. 1 with a v-crotch 9 feet above ground, 1938
Mammoth Cave National Park; National Park Service
An example of healing over a bark tracing, tree No. 82, Mammoth Cave Hotel and cabin group No. 1 with a v-crotch 9 feet above ground, 1938
Mammoth Cave National Park; National Park Service
Group portrait of Mammoth Cave guides that made new discovery on old Mammoth Cave, left to right Claude Hunt, Carl Hanson, Leo Hunt, Pete Hanson, 1939
Mammoth Cave National Park; National Park Service
Six women sunning on the lawn near the tennis courts, while a seventh woman is standing behind them with a tennis racket, at Mammoth Cave Hotel
Mammoth Cave National Park; National Park Service
The need for fire hazard reduction work in this old burn on Mammoth Cave estate is clearly evident, farmers have removed some of the best
Mammoth Cave National Park; National Park Service
Fire protection, view of new steel lookout tower at Hickory Cabin from old wooden structure that has been used as a fire tower in the past, 1938
Mammoth Cave National Park; National Park Service
Weeds and grasses are gaining a foothold on the bottom of this wide gully, the sides are continuing to scours and laterals beginning to form
Mammoth Cave National Park; National Park Service
NP-2 dining room with table spread for farewell supper given for enrollees who were leaving on March 25, 1939, one hundred and two men left at this time, 1939
Mammoth Cave National Park; National Park Service
No 4 entrance Trail complete, Boone's Ave., cave used in report from Oct 1, 1934 to Dec 31, 1934, completed Trail in a narrow passage of ten feet in width, 1934
Mammoth Cave National Park; National Park Service
Safety rope whipping with friction tape, at left is an example of taping carried to end of rope and not tucked in between rope strands, and is easily worked off
Mammoth Cave National Park; National Park Service
Part of a series of images showing the moving and replanting of an 18 foot Elm tree at the Abraham Lincoln Birthplace National Historical Park, view of tree on its side showing roots
Mammoth Cave National Park; National Park Service
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