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81 Chapel Street, Albany, New York 







y4 TIMELT BOOK OF UNQUESTIONED AUTHORITT 



in which the results of the patient, jninute observations 

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Problems of the Panama Canal 



Including the Physics and Hydraulics of the River Chagres, the Clima- 

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 HENRY L. ABBOT (U. S. Army, Retired), Late Colonel Corps of 

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