wakman.] ALGONKIAN— APPALACHIAN. 43 
Amphibole-schist of Oregon, Coos Bay quadrangle GF 73, pp 2, 5 
of Oregon, Port Orford quadrangle GF 89, p 3 
Amphibolite of Alaska, Ketchikan district PP 1, p 48 
Analcite, action of ammonium chloride on Bull 207, pp 8-16 
analysis of, from Colorado, Golden Bull 207, p 11 
from Nova Scotia, Wassons Bluff Bull 207, p 8 
Andesite, analysis of, from Montana, Flkhorn Mountain Ann 22, ir, p 525 
analyses of, from Oregon, Crater Lake PP 3, p 94 
of Alaska, Copper Eiver district Copper, pp 57, 58 
of Montana, Elkhorn district, petrography of Ann 22, n, pp 523-531 
of Oregon, Blue Mountains Ann 22, n, pp 591-592 
Mount Mazama PP 3, pp 23-31 
of Washington, Ellensburg quadrangle GF 80, pp 2, 4 
Monte Cristo Ann 22, ir, pp 791-796, 799-801 
Yakima County WS 55, p 22 
thin sections of, from Oregon, Crater Lake National Park PP 3, pp 76, 80, 98 
Andesitic breccia, analysis of, from Colorado, Silverton quadrangle. .Bull 182, p 125 
of Colorado, Silverton quadrangle, mineralogic composition of.. Bull 182, p 126 
Andesitic rocks, analyses of, from Montana, Elkhorn district Ann 22, n, p 430 
of Colorado, Engineer Mountain, mineralogic composition of Bull 182, p 120 
of Montana, Elkhorn district Aim 22, 1 1, pp 429-431 
Androscoggin River, Maine, flow of, measurement of Ann 22, 
iv, pp 59-61; WS 47, pp 31-32; WS 65, pp 20-21; WS 75, p 22 
hvdrographic investigations on WS 69, pp 70-91 
Animas River, Colorado, flow of, measurement of .' . Ann 22, 
iv, p 394; WS 50, pp 383-384; WS 66, p 97; WS 74, pp 120-124 
Animikie quartzite of Minnesota Bull 8, pp 17, 18 
Animikie series of Great Lakes region \nti 10, i, i»|> 402-406; Bull 8, pp 35-37 
of Minnesota, Vermilion district Mon xlv, pp 374-396 
Antelope Range, Nevada, geology of Bull 208, pp 37-38 
Anticlines in Washington, Yakima County , WS 55, pp 23-24 
Antietam Creek, Maryland, flow of, measurement of Ann 22, 
Iv, p 134; WS 48, pp 117-118; WS 65, pp 230-231; WS 75, p 36 
Antimony, ores of MR 1901, p 968 
statistics of MR 1900, pp 251-255; MR 1901, pp 251-256 
Antrim shales of Michigan Ann 22, in, p 668 
Anvil Creek, Alaska, gold on N and X, pp 73-75 
Apache group of Arizona, Globe district ( PP 12, pp 28-39 
Apalachee River, Georgia, flow of, measurement of. . WS 65, pp 258-259; WS 75, p 66 
Apatite, occurrence of MR 1901, p 761 
Apishapa formation of Colorado GF 71, pp 1 , 3 
Aplin (S. A. ), work in charge of Ann 22, i, p 174; Ann 23, p 161 
Aplite, analysis of, from Montana, Black Butte. . .f. Ann 22, n, p 540 
Aplite of Montana, Elkhorn district, petrography of Ann 22, n, pp 425, 539-543 
Aplite-granite of Montana, Elkhorn district Ann 22, n, p 425 
Aplitic and pegmatitic rocks of Alaska, Ketchikan district PP 1 , p 47 
Aplitic dikes of Vermont, Ascutney Mountain Bull 209, pp 70-77 
Apophy llite, action of ammonium chloride on Bull 207, p 39 
Appalachian coal field, structure of GF 82, p 5 
Appalachian coal field, northern; summary of knowledge Ann 22, in, pp 119-226 
Appalachian coal field, southern; summary of knowledge Ann 22, in, pp 227-263 
Appalachian Mountains, southern, climate of Ann 22, 
iv, pp 179-181; WS 62, pp 22-25 
forests and lumbering in Ann 22, iv, p 178; WS 62, pp 25-30 
