INDEX. 
205 
Page. 
Topographic maps, scale of 56, 60 
uses of 14, 59 
Topographic records, method of keeping . . 19 
Topographic surveys, areas covered by, map 
showing 64 
cost of 63 
field work in, method of 61-63 
Topographic work, increase in T 12 
results of 63 
Topography, division of, work of 55-71 
Traverse, primary, use of 66 
Triangulation, instruments used in 65 
office work in 69 
Page. 
Triangulation and computing, section of, 
work of 64-70 
Underground waters, study of 84-88 
work on, maps showing progress of 86, 87 
Vouchers, preparation and disposal of 20-21 
Waters, analyses of, work on 51 
Weir gaging station, plate showing 84 
Wheeler, G. M., area surveyed under direc- 
tion of 9 
Wheeler Survey, area surveyed by 9 
Yukon Plateau, Alaska, features of 35 
Yukon River, Alaska, course and char- 
acter of 37-38 
O 
