Page:Popular Science Monthly Volume 92.djvu/196

 Is the Origin of Our Skyscrapers to Be Found In

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��The home of the Cliff Dwellers, in Mesa Verde National Park, in southwestern Colorado. This is the largest of the prehistoric ruins on the Mesa. The ruins are three hundred feet long and contain about two hundred rooms, including twenty-two kivas, or underground ceremonial chambers. Several of these may be plainly distinguished m the photograph

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