1891.] Recent Literature. 477 
Eastern, and Southeastern Arizona; Southwestern, Western, North- 
western, and Central New Mexico; and Central, Southern, and South- 
western Colorado. The area of the expedition of 1872 was entered 
along certain lines. 
The several parties of the expedition in 1874 took the field from the 
camp of organization at Pueblo, Colorado, previous to and on the 6th 
of August. The territory embraced in the field of operations is 
bounded on the north by the latitude of the Spanish Peaks, and on the 
south by a latitude line passing through Santa Fé; on the east by 
longitude 104° 07’ 30” west, and on the west by the western boundary 
of Colorado and New Mexico, approximately. 
The expedition of 1875 was organized in two sections of three 
parties each, one to operate from Los Angeles, California, and the 
other from Pueblo, Colorado, at initial points. The California division 
disbanded at Caliente, California, in November, 1875, and the Colorado 
section at West Las Animas, Colorado, November 25th. The area 
occupied was 39,169 square miles, including portions of Southern 
Colorado, Northwestern New Mexico, Southern California, small 
sections in Southwestern Nevada, and Western Arizona. 
In 1876 the survey was again organized in two sections ; the Colorado 
section, of two parties, at Fort Lyon, Colorado, and the California 
section, of four parties, at Carson City, Nevada. These sections took 
the field during the month of August, and were disbanded late in 
November at the above-named points. The areas that had been visited 
in 1871, ’72, ’73, 74, and ’75 were again entered along certain lines 
when necessary to perfect the continuous belts of triangulation required 
to cover entirely the country under examination. 
The expedition in 1877 was organized in three divisions ; one, of 
“two parties, at Fort Lyon, Colorado; a section, of two parties, at 
Carson, Nevada; and a third, of two parties, at Ogden, Utah. The 
field of survey comprised 32,477 square miles, in West Central Colorado, 
Central New Mexico, Northwestern Utah, Southeastern Idaho, North- 
€astern and East Central California, and South Central Oregon 
_ The areas embraced by the expeditions of 1873, 1874, 1875, and 
1876 were again entered along certain lines when required to complete 
triangular observation. 
The expedition of 1878 took the field in three divisions of three 
Parties each. Of the Colorado division one party was organized at 
Fort Stanton, New Mexico, and two at Fort Garland, Colorado. The 
two: parties of the California division were organized et at 
Am, Nat.—May.—5. 
