llS INDEX TO PUBLICATIONS OF tf. S. GEOL. SURVEY. [bull.215. 
Ingleiield sandstone of Indiana GF 84, p 3 
Inostranzeff (A.), primary deposits of platinum in the Urals Bull 193, pp 76-81 
Insects, fossil; Coleoptera, rhynchophorous, of United States Ann 15, pp 94-95 
Instructions of United States Geological Survey. ( See page 31 of this bulletin. ) 
Intermediate series of Colorado. (See Silverton series.) 
Intrusion of granite into graywacke-slate, intricate nature of, in Minnesota, 
Mesabi district Mon xliii, p 85 
Intrusive rocks of Alaska, Copper River district Copper, pp 53-55, 57 
of Arizona, Globe district PP 12, p 57 
of Minnesota, Vermilion district Mon xlv, passi 
of Oregon, Blue Mountains Ann 22, n, pp 585-58 
Invertebrates, fossil; ammonoids, Carboniferous, of America Mon. xli 
corals of the Buda limestone Bull 205, pp 37— 4< 
correlation of geological faunas, a contribution to Devonian paleontology .Bull 210 
fauna of Hamilton formation of Cayuga Lake section, New York Bull 206 
Mollusca of Buda limestone Bull 205 
( >f Alaska, Seward Peninsula PP 2, pp. 20, 21, 22 
( .f A rizona, Globe district PP 12, pp. 40-44 
( »f Carboniferous Ann 3, pp 425, 453, 456, 49<f 
of Kansas, tabulated list of Bull 211, pp 73-82 
of Cretaceous Ann 3, pp 420-550 
of Devonian Ann 3, pp 424, 455, 488 
of Idaho, Snake River Plains Bull 199, p. 56 
of Juratrias Ann 3, pp 425, 420, 440, 457, 472, 4921 
of Laramie group Ann 3, pp 420-550 
of Neocene Ann 3, pp 420-550 
of Nevada and California Bull 208, passim, 
of Texas-Louisiana Gulf Coast Bull 212, pp. 20-25, 53, 87 
paleontology of Upper Carboniferous rocks of Kansas section. . .Bull 211, passimi 
Pseudoceratites of the Cretaceous Mon x liv 
Iola limestone of Kansas, fauna of Bull 211, p 40 
Iowa; borings, dee}), in, list of WS 57, pp 39-42| 
building stone from, statistics of MR 1900,1 
p 662 et seq; MR 1901, p 643 et seq 
clay products of, statistics of MR 1900, p 695 et seq; MR 1901, p 674 et seq 
coal area and statistics of. MR 1900, 
pp 276, 359, 383-387; MR 1901, pp 287 et seq, 379-383 
coal fields of, production, etc., of Ann 22, in, p 13 
summary of knowledge Ann 22, in, pp 333-366 
-old and silver from, statistics of MR 1900, p 110 
gypsum from, statistics of MR 1900, pp 828, 830; MR 1901, pp 846, 847; 
iron ore from, statistics of MR 1900, pp 43, 57; MR 1901, pp 45, 63, 76 
limestone production of MR 1900, pp 662, 
685, 686, 687, 689; MR 1901, pp 643, 644, 667, 668, 669, 670 
maps, geologic and topographic, of. (See Map.) 
marble production of MR 1900, pp 682, 68c| 
mineral springs of MR 1900, pp 901, 903; MR 1901, pp 963, 964 
sandstone production of MR 1900, pp 662. 
670, 671, 672, 673; MR 1901, pp 643, 644, 656, 657, 658, 65£ 
topographic work in Ann 22, i, pp 137, 138, 156, 172; Ann 23, pp 128, 141 
topography of northeastern Ann 11, i, pp 358-36; 
Iowan loess of Indiana, Ditney quadrangle GF 84, pp 4-£ 
Iridium, ores of MR 1901, p 97( 
Iridosmine, analyses of, from various localities Bull 193, p 21 
