APPENDIX TO REPORT OF THE SECRETARY. G7 



of Elevations," &c., by Henry Gannett, entirely revised and greatly en- 

 larged, now forming an independent octavo volume of 1G7 pages. 



C. Miscellaneous i^ublications No. 7, "Ethnography and Philology of 

 the Hidatsa Indians," by Dr. Washington Matthews, U. S. A. 



7. Miscellaneous publications No. 8, " Fur-bearing Animals : a mono- 

 graph of North American Mustelidce," by Dr. Elliott Coues, U. S. A. 



8. Miscellaneous publications No. 9, "Descriptive Catalogue of Photo- 

 graphs of North American Indians," by W. H. Jackson. 



9. Eleventh volume of Final Reports, quarto series, "Monograph of 

 North American Rodentia," by Dr. Elliott Coues, U. S. A., and Prof. 

 J. A. Allen, forming a large quarto volume of 1110 pages, with plates. 



Various publications, including Leo Lesquereux's Tertiary Flora, to 

 form Volume VII of the quarto series, several numbers of the Bulletin, 

 miscellaneous publications, and two annual reports are now in press. 



GEOaEAPHICAL AND GEOLOGICAL SURVEY OF THE ROCKY MOUNTAIN 

 REGION, BY PROF. J. W. POWELL, IN 1877. 



About the middle of May last, the surveying corps again took the 

 field. This year the rendezvous camp was at Mount Pleasant, a little 

 town in Utah, about 125 miles south of Salt Lake City. Three parties 

 were organized, under the direction of Prof. A. H. Thompson; one to 

 extend the triangulation, and two for topographic purposes, the latter 

 being under charge of Mr. W. H. Graves and Mr. J. H. Renshawe, re- 

 spectively, and the former under the immediate diiection of Professor 

 Thompson, assisted by Mr. O. D. Wheeler. 



The area designated for the season's work lies between 38° and 40° 

 30' north latitude, and between 109° 30' and 112° west longitude, Green- 

 wich, and is embraced in atlas sheets 86 and 75. 



Triangulation. — The triangulation party left Mount Pleasant in June. 

 The work of this year being a continuation of the expansion from 

 the Gunnison base-line, measured in 1874, it was desirable to first visit 

 some of the geodetic points established in previous years, but the 

 unprecedented amount of snow yet remaining in the high plateaus and 

 mountains rendered this impracticable, and the first part of the season 

 was spent in establishing stations on the Ta-va-puts Plateau west of the 

 Green Eiver. In midsummer the party was able to visit the high plateaus 

 and connect the work of past years with that of this season. Later the 

 triangulation was extended to the east, joining the work of the United 

 States Geological and Georaphical Survey of the Territories, under 

 charge of Dr. F. V. Hayden, and to the north to join the work of the 

 United States Geological Exploration of the Fortieth Parallel, Clarence 

 King, United States geologist, in charge. The whole area of the sea- 

 son's work embraces something more than 13,000 square miles. The 

 instrument used was the theodolite, hereafter described. The points 

 sighted to on the geodetic stations were either artificial monuments or 

 well-defined natural points, and all stations were marked by stone cairns. 

 Topographic work by Mr. Graves. — The district assigned to Mr. Graves 



