The National Geographic Magazine, Volume 34National Geographic Society, 1918 - Geography Indexes kept up to date with supplements. |
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Page 1
... STEEL THE NATION'S GREATEST ASSET , " ETC. This is the first of a series of articles concerning the principal cities of the United States which will appear from time to time in the NATIONAL GEOGRAPHIC MAGAZINE . In word and picture ...
... STEEL THE NATION'S GREATEST ASSET , " ETC. This is the first of a series of articles concerning the principal cities of the United States which will appear from time to time in the NATIONAL GEOGRAPHIC MAGAZINE . In word and picture ...
Page 29
... steel pipes four feet in diameter would have been required . Such a pipe - line would have cost twice as much as a tunnel of equal capacity through the eternal bed- rock . It has been estimated that , within the city limits alone ...
... steel pipes four feet in diameter would have been required . Such a pipe - line would have cost twice as much as a tunnel of equal capacity through the eternal bed- rock . It has been estimated that , within the city limits alone ...
Page 33
... steel pipe - lines could be laid on the floor of the valleys ; inverted siphons or pressure tun- nels could be dug far below the surface through solid rock . 26 37 Photograph from Norman Thomas and W. W. Rock. THE NATIONAL GEOGRAPHIC ...
... steel pipe - lines could be laid on the floor of the valleys ; inverted siphons or pressure tun- nels could be dug far below the surface through solid rock . 26 37 Photograph from Norman Thomas and W. W. Rock. THE NATIONAL GEOGRAPHIC ...
Page 45
... steel sheet piling around the space to be excavated . Then the water was pumped out of the area enclosed by the cofferdam and work was begun on the building of the piers . The relief of the congestion beyond the piers is one of the main ...
... steel sheet piling around the space to be excavated . Then the water was pumped out of the area enclosed by the cofferdam and work was begun on the building of the piers . The relief of the congestion beyond the piers is one of the main ...
Page 57
... STEEL ON THE DOCKS AT BIERUT , SYRIA Beautifully situated on the south side of St. George's Bay , Beirut is the chief commercial city in Syria , and , since the construction of water- works in 1875 , has been considered the healthiest ...
... STEEL ON THE DOCKS AT BIERUT , SYRIA Beautifully situated on the south side of St. George's Bay , Beirut is the chief commercial city in Syria , and , since the construction of water- works in 1875 , has been considered the healthiest ...
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