Smithsonian Report, 1950. — Black 



PLATE 12 





1. Mud flow on top of permafrost along the Alaska Railroad resulting in track 

 settling, near Moody, Alaska. Photographed June 22, 1948. 



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2. Settling cracks in foundation wall of the U. S. Post Office, Nome, Alaska, 

 after thawing of permafrost under the building. Photographed August 10, 

 1948. 



