Wikimedi'Òc

Indirect lighting (white) bringing out shadows made this effective. The Petrified Forest, Oregon Caves. - NARA - 298933.tif - US National Archives bot

Direct illumination from across passage not very effective because of dirty formation. The Bee Hive, Oregon Caves. - NARA - 298934.tif - US National Archives bot

Another example of place where a consideralbe numbe rof sources of light were required to bring out detail. The... - NARA - 298935.tif - US National Archives bot

Lighted with many sources protably connected to permit changing of shadow effects. The Garden of the Gods. - NARA - 298936.tif - US National Archives bot

Site of the first and most effective use of red light. Very striking. The Coral Gardens. - NARA - 298937.tif - US National Archives bot

This gives a good idea of amount of detail and shadows which necessitated cross light to develop all features. The... - NARA - 298938.tif - US National Archives bot

Control switches and spot light installed at landing. Yosemite Landing, Ghost Room. - NARA - 298939.tif - US National Archives bot

Lighted with green, Bird of Paradise - NARA - 298940.tif - US National Archives bot

Indirect blue lights under bridge, Looking Down into the River Styx. - NARA - 298941.tif - US National Archives bot

Supply cables concreted into back edge of path, behind bottom of ladder and across to neares upright of railing. All... - NARA - 298942.tif - US National Archives bot

Three colors, blue, red and amber crossed effects worked out to show detail and beauty of these curious formations.... - NARA - 298943.tif - US National Archives bot

Typical location along passageway showing problem to provide overhead illumination and concealment of cables and... - NARA - 298944.tif - US National Archives bot

One of the most striking and most difficult places tolight in a satisfactory manner. Both depth and detail essential.... - NARA - 298945.tif - US National Archives bot

Larest column at extreme bottom of Caves. Formation dirty and only general illumination attempted. The Grand Column. - NARA - 298946.tif - US National Archives bot

1 1-2 hours free entertainment provided at night by management. View taken during short talk by Sabin. - NARA - 298947.tif - US National Archives bot

Lower entrance. First switch control in rear of rock on right side of trail. The Entrance to the Oregon Caves. - NARA - 298948.tif - US National Archives bot

On the way to the Cave, Forest Highway built by Bureau of Public Roads. - NARA - 298949.tif - US National Archives bot

Administration building ("The Lodge"), restaurant and other services. - NARA - 298950.tif - US National Archives bot

Indirect lighting (white) bringing out shadows made this effective. The Petrified Forest, Oregon Caves. - NARA - 298933.jpg - US National Archives bot

Direct illumination from across passage not very effective because of dirty formation. The Bee Hive, Oregon Caves. - NARA - 298934.jpg - US National Archives bot

Another example of place where a consideralbe numbe rof sources of light were required to bring out detail. The... - NARA - 298935.jpg - US National Archives bot

Lighted with many sources protably connected to permit changing of shadow effects. The Garden of the Gods. - NARA - 298936.jpg - US National Archives bot

Site of the first and most effective use of red light. Very striking. The Coral Gardens. - NARA - 298937.jpg - US National Archives bot

This gives a good idea of amount of detail and shadows which necessitated cross light to develop all features. The... - NARA - 298938.jpg - US National Archives bot

Control switches and spot light installed at landing. Yosemite Landing, Ghost Room. - NARA - 298939.jpg - US National Archives bot

Lighted with green, Bird of Paradise - NARA - 298940.jpg - US National Archives bot

Indirect blue lights under bridge, Looking Down into the River Styx. - NARA - 298941.jpg - US National Archives bot

Supply cables concreted into back edge of path, behind bottom of ladder and across to neares upright of railing. All... - NARA - 298942.jpg - US National Archives bot

Three colors, blue, red and amber crossed effects worked out to show detail and beauty of these curious formations.... - NARA - 298943.jpg - US National Archives bot

Typical location along passageway showing problem to provide overhead illumination and concealment of cables and... - NARA - 298944.jpg - US National Archives bot

One of the most striking and most difficult places tolight in a satisfactory manner. Both depth and detail essential.... - NARA - 298945.jpg - US National Archives bot

Larest column at extreme bottom of Caves. Formation dirty and only general illumination attempted. The Grand Column. - NARA - 298946.jpg - US National Archives bot

1 1-2 hours free entertainment provided at night by management. View taken during short talk by Sabin. - NARA - 298947.jpg - US National Archives bot

Lower entrance. First switch control in rear of rock on right side of trail. The Entrance to the Oregon Caves. - NARA - 298948.jpg - US National Archives bot

On the way to the Cave, Forest Highway built by Bureau of Public Roads. - NARA - 298949.jpg - US National Archives bot

Administration building ("The Lodge"), restaurant and other services. - NARA - 298950.jpg - US National Archives bot