The National Geographic Magazine, Volume 100National Geographic Society, 1951 - Geography Indexes kept up to date with supplements. |
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Page 551
... walls are very thin , the pipe has such great tensile strength that the walls do not easily tear or rip apart despite high pressures . Some 25 years ago pressures in the pipes were rarely more than 275 to 350 pounds to the square inch ...
... walls are very thin , the pipe has such great tensile strength that the walls do not easily tear or rip apart despite high pressures . Some 25 years ago pressures in the pipes were rarely more than 275 to 350 pounds to the square inch ...
Page 831
... walls . Within these walls we found two stone forts , one inside the other . On the east side of this fortress we un- earthed another room . It was almost intact , and the plaster , painted in bright reds , yellows , blues , greens ...
... walls . Within these walls we found two stone forts , one inside the other . On the east side of this fortress we un- earthed another room . It was almost intact , and the plaster , painted in bright reds , yellows , blues , greens ...
Page 835
... wall between the hillside and a level area stretching to the bank of the wadi . At either end of the façade , massive walls extended at right angles in the direction of the stream . Originally there was a third wall , nearer the wadi ...
... wall between the hillside and a level area stretching to the bank of the wadi . At either end of the façade , massive walls extended at right angles in the direction of the stream . Originally there was a third wall , nearer the wadi ...
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