Telephone line construction, switchboard house for new telephone system, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, switchboard house for new telephone system, 1939
Mammoth Cave National Park; National Park Service
Showing the telephone wires being hooked up at the switchboard, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, laying cable for underground lines of new telephone system, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, splicing underground cable at automatic switchboard house for new telephone system, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, view in automatic switchboard house, scene shows telephone lines being tested, 1939
Mammoth Cave National Park; National Park Service
Placing crossarms on telephone poles
Mammoth Cave National Park; National Park Service
Placing crossarms on telephone poles
Mammoth Cave National Park; National Park Service
Needed maintenance on telephone lines
Mammoth Cave National Park; National Park Service
Telephones and Telegraphs and Municipal Electric Fire-Alarm and Police-Patrol Signaling Systems
Clemson University Libraries
vol. 1912; Call number: c3.2: t23.
1915
Raising pole on new telephone line, 1938
Mammoth Cave National Park; National Park Service
Raising pole on new telephone line, 1938
Mammoth Cave National Park; National Park Service
Man on phone
Biscayne National Park; National Park Service
Man talking on phone, Biscayne National Park.
Showing men constructing new telephone line near the central office, 1939
Mammoth Cave National Park; National Park Service
Construction of telephone system, placing cross-arms and insulators on telephone pole
Mammoth Cave National Park; National Park Service
Forestry, pruning trees along telephone line, cleared area on Highway 70, 1938
Mammoth Cave National Park; National Park Service
Forestry, pruning trees along telephone line, cleared area on Highway 70, 1938
Mammoth Cave National Park; National Park Service
Enrollee drilling into new telephone pole while another enrollee removes bark from pole
Mammoth Cave National Park; National Park Service
Construction, showing how wire is stretched from post to post, telephone lines, 1939
Mammoth Cave National Park; National Park Service
Clearing area for new telephone line and cuttingdangerous timber from near line, 1938
Mammoth Cave National Park; National Park Service
Telephone line construction, laying rock wall for automatic switchboard building for new telephone system, 1939
Mammoth Cave National Park; National Park Service
Cleared area for new telephone line to be usedby the park service, 1938
Mammoth Cave National Park; National Park Service
Telephone line construction, digging ditch near technicians' building for underground telephone line, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, using truck to stretch aerial cable on new telephone system line, 1939
Mammoth Cave National Park; National Park Service
Forestry, showing type of cutting employed in clearing for telephone line construction, NP-2
Mammoth Cave National Park; National Park Service
Rangers Loles and M. Kearn stand in lightly wooded area using telephone jack
Mammoth Cave National Park; National Park Service
Showing men carrying reel of wire for the telephone line which is being constructed in the park area, 1939
Mammoth Cave National Park; National Park Service
Telephone line demolition, taking up poles on which telephone wire was strung before underground wire was installed, 1939
Mammoth Cave National Park; National Park Service
Telephone line construction, riding messenger cable and attaching rings to carry aerial telephone cable on new telephone system line, 1939
Mammoth Cave National Park; National Park Service
Forestry, cutting dead trees from near new telephone line to prevent them from falling on and damaging the line, 1938
Mammoth Cave National Park; National Park Service
Forestry, cutting dead trees from near new telephone line to prevent them from falling on and damaging the line, 1938
Mammoth Cave National Park; National Park Service
Generously Supported By
