FITCH.] 
IN INDIAN TERRITORY. 
17 
to see above the timber. An interior tripod, made of 2 by 4 inch scant- 
ling, well braced, was first erected; outside of this, and entirely inde- 
pendent of it, a four-sided platform was built for the observer to 
stand on and also to support the signal, which was above center of 
tripod. 
The total area controlled is about 31,000 square miles. 
The geodetic coordinates of all stations were first computed from 
Savanna astronomic station, using the observed azimuth taken at 
north base. 
Check azimuth observations were made at stations Barber, Harman, 
Purcell, and Good. 
After connections with other astronomic positions had been made, as 
mentioned below, a mean value dependent upon all four was adopted 
and a constant correction of +1.08" in latitude and +10.72" in longi- 
tude was applied to all positions previously computed. 
In 1896-97 connection was made with Poteau, Cavanal, Peak, and 
Sugarloaf, stations of the Arkansas triangulation of 1887, whose posi- 
tions depend upon a mean value adopted from Fort Smith and Little 
Rock astronomic stations of the United States Coast and Geodetic 
Survey. 
In 1899, Marlow, the extreme western triangulation station in 
the Chickasaw Nation, was connected b}^ primary traverse with the 
astronomic station of the United States Coast and Geodetic Survey 
at Marlow railroad station. 
In December, 1899, Wasson triangulation station, in the northern 
portion of the Cherokee Nation, was connected by primary traverse 
with the astronomic station located in 1881 by Prof. P. S. Woodward, 
United States Geological Survey, at Oswego, Kansas. 
Comparisons of positions computed from Savanna with other astro- 
nomic locations: 
Latitude dif- 
ference. 
Longitude dif- 
ference. 
Savanna 
Feet. 
+ 
-1- 201 
267 
j- 503 
Feet. 
+ o 
1,143 
1,149 
'821 
Marlow 
Fort Smith and Little Rock 
Total 
+ 109 
+ 778 
+ x 117 
+ 895 
+10. 72 
Correction . 
+1.08 
1 Longitude increase by Coast and Geodetic Survey adjustment published 1897. 
Bull. 175 2 
