136 WARMAN 



24. 49th Congress, 2d session. Senate. Mis. doc. No. 22. 



Letter from the Secretary of the Interior, transmitting 

 report of the Director of the U. S. Geological Survey 

 on the merits of the bill S. 1907 " to facilitate the set- 

 tlement and develop the resources of the Territory of 

 Alaska, and open an overland and commercial route 

 between the United States, Asiatic Russia, and Japan," 

 and the feasibility of the construction of the railroad 

 proposed. 



Pp. i-io, 8°, two maps. 



25. The cause of earthquakes. 



In Forum for December, 18S6, vol. 2, pp. 370-391, New 

 York, 1887, 8°. 



1888. 



26. Methods of geologic cartography in use by the United 



States Geological survey. (Presented, on behalf of 

 the Director of the Survey, Major J. W. Powell, by 

 W. J. McGee, U. S. geologist.) 



In Congres geologique international, compte-rendu de la 

 3°'" session, Berlin, 1885, pp. 221-240, Berlin, 1888, 

 large 8°. 



Sub-headings are : introduction ; the geographic bases ; 

 the geologic maps ; general considerations ; taxonomy and 

 nomenclature ; the conventions ; general regulations. 



Issued separately, with paper cover bearing title. 



27. The laws of hydraulic degradation. 



In Science for November 16, 1888, vol. 12, pp. 239-233, 

 New York, 1888, 4°. 



A paper read before the National Academy of Sciences at 

 its meeting in New Haven, November, 1S8S. 



Appeared also in The Mining Industry and Tradesman 

 for September 30, and (?)., 1S88, pp. 226-228, 234-236, 

 Denver, Colo., 1888, folio. 



28. Communication on the American report of the Interna- 



tional Congress of Geologists. 



In American Journal of Science for December, 188S, 3d 

 series, vol. 36, pp. 476a-476e, New Haven, Conn., 1888,8°. 



Separates were issued, without change. 



