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LETTER OF SUBMITTAL. 



TJ. S. Department of Agriculture, 



Division of Botany, 

 Washington, D. C, December 24, 1892. 

 Sir: I have the honor to submit for your consideration the manu- 

 script of my report as botanist of the Death Valley Expedition of 1891. 

 Respectfully, 



Frederick V. Coville. 



Dr. George Vasey, 



Botanist, U. 8. Department of Agriculture. 



