wakman.] COAL COLORADO. 79 
Collier (A. J.) j Brooks (A. II.), and Richardson (G. !>.), reconnaissance of 
the Cape Nome and adjacentgold fields of Seward Penin- 
sula, Alaska, in 1900 N and N, pp 1-180 
Colombia, emerald in MR 1000, p 758 
manganese ore from, statistics of. .MR 1000, pp L30, 140; MR 1901, pp L43 -144, 155 
platinum in Bull 193, pp 31, 62-65 
Color of river water, determination of WS 76, pp 73-86 
of water, determination of, in sanitary analysis WS 79, p 23 
(Colorado; Animas River, flow of, measurement of Ann 22, 
iv, p394; WS 66, p 97; WS 7 1, pp 120-124 
Arkansas River, flow of, measurement of Ann 22, iv, pp 510 343; WS 50, pp 
383-384; WS 66, pp 47-55; WS 71, pp 00-100; WS75, pp 145-147. 
hydrographic data relating to WS 50, pp 319-320, 322-329 
Arkansas River division, irrigation system of . . WS 74, pp 70-100 
artesian water in Spanish Peaks quadrangle GF 71, p 7 
asphalt in, occurrence, geology, etc., of vnn 22, i, pp 527-330 
Bear Creek, flow of, measurement of Ann 22, iv, p 321; 
WS49, pp 284-285; WS 66, p 31; WS 74, pp36-40; WS 75, p 127 
seepage on, computations of WS 50, p 304 
Big Thompson Creek, flow of, measurement of Ann 22, iv, p 320; WS 40, 
pp 290-291; WS 66, p 36; WS 74, pp 52-55; WS 75, p L30 
seepage on, measurement of WS 50, p 305 
borings, deep, in, list of WS 57, pp 17-20 
Boulder, oil field near '....' Bull 213, pp 322-332 
Boulder Creek, flow of, measurement of Ann 22, iv, p 324; 
WS 49, pp 286-288; WS 66, pp 32-34; WS 75, p 129 
seepage on, computations of WS 50, p 304 
building stone from, statistics of MR 1900, 
P 002 et seq; MR 1901, p 045 el seq 
Cache la Poudre River, flow of, measurement of ... . .Ann 22, iv, p 327; WS 49, 
pp 291-292; WS 66, pp 36-37; WS 74, pp 55-59; WS 75, p 130 
seepage on, measurement of WS 50, p 305 
cement from, statistics of MR 1900, p 737; MR 1901, pp 721, 722 
clay products of, statistics of MR 1900, p 695 et seq; MR 1901, p 674 et seq 
Clear Creek, flow of, measurement of Ann 22, iv, p 322, WS 49, 
pp 285-286; WS 66, pp 31-32; WS 74, pp 40-42; WS 75, p 128 
seepage on, computations of WS 50, p 304 
coal in Spanish Peaks quadrangle .GF 71, pp 5-6 
coal area and statistics of MR 1900, 
pp 277 et seq, 359, 368-371; MR 1901, pp 287 et seq, 366-368 
coal fields, production, etc., of Ann 22, in, pp 12, 13 
summary of knowledge Ann 22, in, pp 427-439 
coke in, manufacture of MR, 1900, 
pp462 et seq, 489-490; .AIR 1901, pp 454 et seq, 481-483 
Colorado River Basin, miscellaneous measurements in WS 66, p 98 
Conejos River, flow of, measurement of. . . . WS 50, p 348; WS 74, pp 106-107, 109 
seepage on, measurement of WS 50, p 306 
copper from, statistics of MR 1900, pp 143, 144; MR 1901, pp 160, 161, 173 
copper deposits at Pearl, reconnaissance examination of ...Bull 213, pp 163-169 
corundum in Bull 180, p 80 
Dolores River, flow of, measurement of Ann 22, i v, p 391 ; WS 50, 
pp 380-381; WS 66, p 95; WS 74, pp 139-142; WS 75, p 175 
Florida River, flow of, measurement of WS 66, 
pp 96-97; WS 74, pp 119-120; WS 75, p 176 
