WESTERN DIVISION, 
197 
NEW MEXICO. 
TRIANGULATION STATIONS. 
BERNALILLO, SOCORRO, AND VALENCIA COUNTIES. 
During December, 1904, and January and February, 1905, triangu- 
/tion was extended over three 30-minute quadrangles and one 
5-minute quadrangle in the valley of the Rio Grande by R. H. 
hapman, topographer. 
A base 5.943 miles in length was measured near San Antonio on a 
tngent of the Santa Fe Railway and an azimuth observed at North 
ase station, with a check azimuth at Socorro Peak. A position for 
orth base station was assumed and computations made through 
osed figures to the vicinity of Albuquerque, where a tie was made to 
lack Rock, a point established by A. P. Davis in 1887, and to the 
-oss on the Roman Catholic Church at Albuquerque, which is one 
I the points given by R. S. Woodward in his astronomic deter- 
Lination of 1885. 
The difference in position at Black Rock was applied as a constant 
Direction to the points in the scheme. The positions given are 
lerefore based on those brought eastward from the base and astro- 
omic determination at Fort Wingate, N. Mex., and are very close to 
le United States standard. Fifteen stations were occupied, while 
gnals were erected on 15 stations, one of which, Magdalena Peak, 
as not occupied. There were 21 points intersected in the towns 
long the river or adjacent to the railroad lines. 
ALBUQUERQUE, UNIVERSITY FLAGPOLE, BERNALILLO COUNTY. 
At University of New Mexico, on east extension of Railroad avenue, 
ti bench overlooking the city. 
Station mark: Center of north flagstaff. 
[Latitude 35° 04' 
53.82". 
Longitude 10(5° 37' 28.25".] 
To station— 
Azimuth. 
Back azimuth. 
Log. 
distance. 
t It 
27 10 04.12 
27 47 37.00 
116 32 50.76 
O t It 
207 04 04.51 
207 43 55.00 
296 27 47.22 
Meters. 
4. 5435053 
4. 30H1 '.i0(i 
4.1741868 
VIl.i'AN, BERNALTLLO COUNTY 
The northernmost of three rocky buttes on the Mesa Prieta, about 6 
liles northwest of Albuquerque. Highest point in vicinity. Easily 
Bached from south end of bridge at Albuquerque by wagon road to 
a Same as Black Rock station, A. P. Davis, 1887. 
