Forestry, man in beech tree, 1938
Mammoth Cave National Park; National Park Service
Forestry, showing tree pruner cutting off limb of tree in picnic area, 1940
Mammoth Cave National Park; National Park Service
Bark tracing, or open cavity treatment, showing swing board saddlein safety rope, 1938
Mammoth Cave National Park; National Park Service
Forestry, shinning methods for greater security of grasp in foregoing positions, Mammoth Cave arch, 1938
Mammoth Cave National Park; National Park Service
Forestry, shinning methods, the first position of method by which the legs are alternated, 1938
Mammoth Cave National Park; National Park Service
Forestry, shinning methods for greater security of grasp in foregoing positions, Mammoth Cave arch, 1938
Mammoth Cave National Park; National Park Service
Forestry, shinning methods for greater security of grasp in foregoing positions, Mammoth Cave arch, 1938
Mammoth Cave National Park; National Park Service
Forestry, shinning methods for greater security of grasp in foregoing positions, Mammoth Cave arch, 1938
Mammoth Cave National Park; National Park Service
Forestry, pruning operation over cabin group No. 1, nine climbers were visible to the eye, 1938
Mammoth Cave National Park; National Park Service
Forestry, three views showing use of safety rope walking out on branches near Mammoth Cave arch, 1938
Mammoth Cave National Park; National Park Service
Forestry, three views showing use of safety rope walking out on branches near Mammoth Cave arch, 1938
Mammoth Cave National Park; National Park Service
Forestry, three views showing use of safety rope walking out on branches near Mammoth Cave arch, 1938
Mammoth Cave National Park; National Park Service
Forestry, safety ropes used, going up in saddle into first branch, facing away from trunk, Mammoth Cave Hotel area, 1938
Mammoth Cave National Park; National Park Service
Forestry, safety ropes used, going up in saddle into first branch, facing away from trunk, Mammoth Cave Hotel area, 1938
Mammoth Cave National Park; National Park Service
Forestry, two views showing use of safety rope in walking out on branches, tree No. 147 of Mammoth Cave Hotel and cabin group, 1938
Mammoth Cave National Park; National Park Service
Forestry, two views showing use of safety rope in walking out on branches, tree No. 147 of Mammoth Cave Hotel and cabin group, 1938
Mammoth Cave National Park; National Park Service
Sling shot and chalkline improvised for projecting line into tall trees, so that rope may be pulled up for climbing the tree, 1938
Mammoth Cave National Park; National Park Service
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