GEOGRAPHY. 4(50 



comprises Mount Shasta and its foothills, and a considerable portion 

 of the tangled mass of the Coast Eange lying west of that peak. In 

 the progress of his work Mr. Thompson succeeded in taking mules to 

 the top of Mount Shasta, a feat never before accomplished. 



The work of the Wingate division lay, mainly, in Northeastern 

 Arizona, the balance being in Western New Mexico. The country, as is 

 well known, consists almost entirely of plateaus, presenting but little 

 relief, but deeply scored by canons and almost devoid of water, making 

 traveling very difficult. This division, which, under the charge of Prof. 

 A. H. Thompson, was composed of one triangulation party and three 

 topographic parties, was very successful. The season's work added in 

 the neighborhood of 22,000 square miles to the mappt-d area of the 

 country. This, with the work of the previous year, completed three 

 atlas sheets, viz, the regions lying between longitudes 107° and 109° 

 and latitudes 35° and 36° ; between longitudes 109° and 111° and lat- 

 itudes 35° and 30°; and between longitudes 109° and 111° and lat- 

 itudes 36° and 37°. 



Iu the progress of his work Mr. H. M. Wilson, in charge of one of the 

 topographic parties, succeeded in penetrating into the hitherto un- 

 known country in the neighborhood of the junction of the San Juau 

 and the Colorado, and ascended Navajo Mountaiu, a peak rising at the 

 junction of these two streams, and hitherto unvisited. This region is 

 inhabited by a band of renegade Indians, who have heretofore made it 

 extremely dangerous for white men to approach. Becently, however, 

 the prevalence of a contagious disease among them, which has been 

 attributed by them to their hostility to white men, has made them 

 much more friendly, and they gave v.o trouble to this surveying party. 



At the close of the season's work Professor Thompson determined the 

 position of Fort Wingate by astronomical observations. The field work 

 of this division, as well as that of the California division, has beeu upon 

 a scale of 2 miles to an inch. 



In connection with the study of the mining region of the Elk Mount- 

 ains or "Gunnison country" a detailed survey, upon a scale of 2 

 inches to a mile, was made of the area drained by the upper waters of 

 Slate Eiver and Ohio and Anthracite Creeks, under the direction of 

 Mr. Anton Karl. After completing about 1,000 square miles of this 

 area, Mr. Karl was called away by the pressure of other duties, and 

 work was suspended for the season. It was decided to make a resur- 

 vey upon a much more detailed scale than ever before attempted of the 

 area of the Yellowstone Park. This work was assigned to Mr. J. H. 

 Eenshawe, who was, during the previous year, in charge of the work 

 in Southern Montana. Commencing work in the northwestern part of 

 the Park, he surveyed, on a scale of 2 inches to a mile, or about 

 soooo) an area °f some 1 ? 500 square miles, mainly with the plane table. 

 Near the close of the season, after having been driven from the high 

 country of the Park by the snows, he remeasured the Bozeman base, 



