Figure 103 — Ice jam in the Allegheny River, March 1926. The tracks were covered 

 with about 4 feet of ice. (U.S. Weather Bureau.) 



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Figure 104 — Ship icing. The lower parts of the superstructure are the most heavily 

 iced. The spray was predominantly from about four points off the port bow. (U.S. 

 Coast Guard.) 



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