LETTER OF TRANSMITTAL. 
Department of the Interior, 
United States Geological Survey, 
Division of Chemistry, 
Washington, D. (7., February 29, 1888. 
Sir: I have the. bonor to transmit herewith the manuscript of Dr. 
Carl Barus's report u On the Thermo-electric Measurement of High 
Temperatures," and to request that it be published as a bulletin of the 
U. S. Geological Survey. 
Very respectfully, 
F. W. Clarke, 
Chief Chemist. 
Hon. J. W. Powell, 
Director IT. IS. Geological Survey. 
(669) 15 
