200 INDEX TO PUBLICATIONS OF U. S. GEOL. SURVEY. [bull. 215. 
Silurian rocks; Standley shale of Indian territory GF 79, p 4 
Stockbridge dolomite of New York City district GF 83, p 4 
Stringtown shale of Indian Territory GF 79, p 4 j 
.Sylvan shale of Indian Territory GF 79, p 3 
Talihina chert of Indian Territory GF 79, p 4 
Tellico sandstone of Tennessee GF 75, p 3 
Trenton group of Illinois GF 81, p 2 
Trenton limestone of New York Bull 3, p 9 
Union shale of Montana Ann 22, n, p 438 
Utica slates of New York Bull 3, p 9 
Valdes series of Alaska Copper, pp 33, 34-37 
Viola limestone of Indian Territory GF 79, p 3 
Waterlime formation in Erie and Ohio basins Mon xli, pp 55-56 
Silurian system, definition of Ann 14, i, p 43 
Silver in Alaska, Norton Bay region N and N, pp 213-214 
in Colorado, Silverton quadrangle Bull 182 
in Idaho, Nez Perce region WS 54, pp 127-129 
ores of MR 1901, p 972 
Silver and gold in Oregon, Blue Mountains, distribution, age, etc., of Ann 22, 
ii, pp 599-629 
in shales from western Kansas, tests for Bull 202 
production of, statistics of MR 1900, pp 105-113; MR 1901, pp 117-126 
publications on Bull 213, pp 90-91 
(See, also, Ore deposits.) 
Silver Peak district, Nevada, ore deposits of Bull 213, pp 85-86 
Silver Peak Range, Nevada, geology of Bull 208, pp 184-186 
Silverton quadrangle, Colorado, economic geology of Bull 182 
Silverton series of Colorado, Silverton quadrangle Bull 182, p 32 
Simpson formation of Indian Territory GF 79, p 
Sinuk Basin, Alaska, gold in N and N, p 96 
Sioux quartzite of Minnesota Bull 81, pp 181-186 
Skaneateles outlet, New York, How of, measurement of WS 65, pp 116-128 
Skolai Mountains, Alaska, topography of Copper, p 31 
Skykomish River, Washington, forest conditions in basin of PP 6, pp 19-20 
Slag cement. (See Cement, slag.) 
Slags, analyses of, various localities .Bull 213, pp 222, 225, 229 
Slags, iron and steel, utilization of Bull 213, pp 221-231 
Slate, analyses of, from Minnesota, Mesabi district Mon xliii, pp 144-145 
analysis of, from Minnesota, Mesabi district, iron formation Mon xliii, p 153 
from Minnesota, Mesabi district (Virginia slate) Mon xliii, p 170 
of Georgia, Rome quadrangle GF 78, p 6 
of Minnesota, Mesabi district Mon xliii, pp 74-75, 143-148 
Mesabi district ( Virginia slate) „ Mon xliii, pp 169-170 
of St. Louis and Mississippi rivers Ann 5, pp 196-197 
statistics of „ .MR 1900, pp 661, 
662, 676-682; MR 1901, pp 643, 644, 645; MR 1901, pp 660-663 
thin section of, from Minnesota, Mesabi district, showing metamorphism 
into cordierite-hornstone Mon xliii, p 174 
Slate industry at Slatington, Pennsylvania, and Martinsburg, West Virginia. Bull 213, 
pp 361-364 
Slate Range, California, geology of Bull 208, p 213 
Slatington, Pennsylvania, slate indus ry at Bull 213, pp 361-363 1 
Slichter (C. S. ) , motions of underground waters WS 67j 
