HOUSE OF REPRESENTATIVE^ .., -, '(- D CUB ? 



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DEPARTMENT OF THE INTERIOR 



FRANKLIN K. LANE, Secretary 



UNITED STATES GEOLOGICAL SURVEY 



GEORGE OTIS SMITH, Director 

 Bulletin 705 



CONSERVATION THROUGH ENGINEERING 



BY 



FRANKLIN K. LANE 



Extract from the Annual Report of the Secretary of the Interior 



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WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1920 



