scale of 1:62,500, with a contour interval of 20 feet, in connection with which 426 miles of traverse were run. For the control of this and adjoining areas 516 miles of levels were run and 157 permanent bench marks were established.

Oregon-Idaho.-Part of the topographic work in Oregon was car ried on under an agreement between the Director of the United States Geological Survey and the State engineer, by which an appropriation of $2,500 by the State was met by an allotment of $3,000 from the Geological Survey for cooperative work. Under this agreement one. party was engaged in mapping the Mitchell Butte quadrangle, in Malheur County, Oreg., and Canyon and Owyhee counties, Idaho, for publication on the scale of 1:125,000, with a contour interval of 50 feet. The area mapped was 759 square miles, of which 30 were in Idaho. This area was supplemented by 105 square miles previously mapped by the Reclamation Service, thus completing the quadrangle, namely, 864 square miles. For the control of this and adjoining areas 150 miles of levels were run, 35 permanent bench marks were established, and 1,097 miles of traverse were run.

South Dakota.--Topographic work was carried on by one party in South Dakota in the Indian quadrangle, the Redwater quadrangle, which was completed, and the Two Top quadrangle, all in Butte County. The total area surveyed was 329 square miles, for publication on the scale of 1:62,500, with a contour interval of 20 feet, in connection with which 1,009 miles of traverse were run.

Teras. Topographic work was carried on by one party in the Texarkana quadrangle, in Cass County, for publication on the scale of 1:125,000, with a contour interval of 20 feet. The area mapped was 321 square miles, in connection with which 1,113 miles of traverse and 22 miles of levels were run and 4 permanent bench marks were established.

Utah. Topographic work in Utah was carried on by two parties in the Iron Springs, Frisco, and Cottonwood Special quadrangles, the last two being completed. The Cottonwood Special, in Summit, Wasatch, Utah, and Salt Lake counties, was surveyed for publication on the scale of 2,000 feet to the inch, with a contour interval of 50 feet, the area mapped being 22 square miles. The Iron Springs Special, consisting of 204 square miles in Iron County, and the Frisco Special, consisting of 93 square miles in Beaver County, were surveyed for publication on the scale of 1: 62,500, with a contour interval of 50 feet. In connection with this work 79 miles of levels were run, 18 permanent bench marks were established, and 698 miles of traverse were run. Washington. One topographic party completed the survey of the Blaine quadrangle, in Whatcom and San Juan counties. The area mapped was 191 square miles, for publication on the scale of 1:62,500,

with a contour interval of 20 feet, in connection with which 769 miles of traverse lines were run. A level party carried forward control for this quadrangle and adjoining areas, running 188 miles of levels and establishing 39 permanent bench marks.

Washington-Idaho.-One party was engaged in the completion of the Pullman quadrangle, in Whitman and Garfield counties, Wash., and Latah and Nez Perces counties, Idaho, for publication on the scale of 1:125,000, with a contour interval of 50 feet. The area mapped was 382 square miles, 68 square miles being in Idaho and 314 square miles in Washington.

FOREST RESERVES.

TOPOGRAPHIC SURVEYS OF FOREST RESERVES.

Arizona, Tonto Forest Reserve.--One party was engaged in the survey of parts of the Four Peaks and Livingston quadrangles, in Maricopa and Gila counties, for publication on the scale of 1:125,000, with a contour interval of 100 feet. The area completed was 655 square miles, in connection with which 160 miles of traverse lines were run. For the control of this and adjoining areas 143 miles of levels were run and 44 permanent bench marks were established.

Arizona, Grand Canyon Reserve.-Another party completed the. survey of the Shinumo quadrangle, consisting of 234 square miles in Coconino County, for publication on the scale of 1:48,000, with a contour interval of 50 feet. In connection with this mapping 432 miles of traverse were run; 28 miles of levels were also run, and 7 permanent bench marks were established. In addition, for the control of the Grand Canyon Reserve, one party carried a line of checked levels from Ash Fork nearly to Jerome Junction, the distance covered being 22 miles, in connection with which 8 permanent bench marks were established.

California, Sierra Reserve.-Two parties were engaged in the topographic survey of the Olancha and Mount Whitney quadrangles, in Tulare, Inyo, and Fresno counties. The area surveyed was 1,920 square miles, for publication on the scale of 1:125,000, with a contour interval of 100 feet, in connection with which 1,418 miles of traverse were run. For the control of these and adjoining areas 332 miles of levels were run, in connection with which 72 permanent bench marks were established. In addition, 238 miles of check levels were run.

California, Stanislaus Reserve.-One party was engaged in the topographic survey of the southwest quarter of the Bridgeport quadrangle, comprising an area of 265 square miles in Mono and Tuolumne counties, for publication on the scale of 1:125,000, with a contour interval of 100 feet. In connection with this work 168 miles of traverse lines were run.