The National Geographic Magazine, Volume 106National Geographic Society, 1954 - Geography Indexes kept up to date with supplements. |
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Page 180
... Light Most Norwegian lighthouses now use electricity instead of gas - lit Dalen burn- ers like this . Powerful prisms in the huge rotating Fresnel lens concentrate light from the mantle ( upper center ) and beam it seaward . As highly ...
... Light Most Norwegian lighthouses now use electricity instead of gas - lit Dalen burn- ers like this . Powerful prisms in the huge rotating Fresnel lens concentrate light from the mantle ( upper center ) and beam it seaward . As highly ...
Page 426
... light - sensitive silver salt that captures photographic images . The plates had to be exposed while still wet and ... light . Prede- cessors of Daguerre had obtained crude images on paper coated with silver nitrate . In these " pictures ...
... light - sensitive silver salt that captures photographic images . The plates had to be exposed while still wet and ... light . Prede- cessors of Daguerre had obtained crude images on paper coated with silver nitrate . In these " pictures ...
Page 435
... light would not affect his pictures , he fixed them in sodium thiosulfate , the " hypo " solution still used today ... lights and shadows properly arranged ( page 426 ) . It was an epochal achievement , the same negative - positive ...
... light would not affect his pictures , he fixed them in sodium thiosulfate , the " hypo " solution still used today ... lights and shadows properly arranged ( page 426 ) . It was an epochal achievement , the same negative - positive ...
Contents
Spearing Lions with Africas Masai These Spartan Aristocratic War | v |
New National Geographic Map Depicts Northern Africa and the Mediter | vii |
Lured by the Grandeur of Distant Peaks Four | xii |
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