180 INDEX TO PUBLICATIONS OF U. S. GEOL. SURVEY. [bull. 215; 
Pulchelliidse of the Cretaceous Mon xliv, pp 136-144 
Pumice, analysis of, from Nebraska MR 1900, p 796 
analysis of, from Utah, Millard County MR 1900, p 796 
from Utah and Nebraska MR 1901, pp 796-797 
occurrence and statistics of MR 1900, pp 795-797; MR 1901, pp 796-797 
Pumping plants in California, southern WS 59, pp 42-46 
Purgatory River, Colorado, flow of, measurement of WS 74, pp 96-98 
Putnam Hill clay of Ohio PP 11, pp 195-196 
Py rite, analysis of, from Georgia, Chestatee Bull 213, p 63 
statistics of .MR 1900, pp 823-826; MR 1901, pp 838-842 
Pyrite and gold deposits of Georgia, Dahlonega district Bull 213, pp 57-63 
Pyrite and mareasite, action of cupric salts on Bull 186, pp 41-46 
(listinguishment and quantitative determination of relative amounts of, in 
mixtures of the two, chemical method of Bull 186 
oxidation of, by potassium permanganate Bull 186, pp 46-47 
paramorphism of, remarks on Bull 186, p 40 
Pyritiferous porphyry of Colorado, Leadville district Ann 2, p 244 
Pyrope, occurrence and statistics of MR 1901, pp 744, 770 
Pyrophyllite, action of ammonium chloride on Bull 207, pp 49-50 
analysis of, from North Carolina, Deep River Bull 207, p'50 
Pysht River, Washington, flow of, measurement of WS 51, p 450 
Quadrant formation of Montana .Ann 22, ir, p 440 
Quakertown clay and shale of Ohio PP 11, p 193 
Quartz (crystal), occurrence and statistics of MR 1900, pp 762-763, 777 
Quartz, crystalline, statistics of. .MR 1900, pp 787, 797; MR 1901, pp 750-754, 770, 800 
Quartz-diorite-porphyry, analysis of, from Montana, Elkhorn Ann 22, u, p 534 
of Montana, Elkhorn district Ann 22, n, p 428 
Quartz-mica-diorite, analysis of, from Arizona, Globe quadrangle PP 12, p 60 
of Arizona, Globe quadrangle PP 1 2, pp 58-65 
Quartz-monzonite, analysis of, from Arizona, Globe district PP 12, p 76 
analysis of, from Montana, Elkhorn, vicinity of Ann 22, n, p 424 
from Sierra Nevada . . ^. Bull 209, p 47 
of Arizona, Globe district PP 12, pp 75-78 
of Montana, Elkhorn district Ann 22, n, pp 423-424 
Quartz-sericite-schist, analysis of, from Vermont, Ascutneyville Bull 209, p 15 
Quartz-slate, micaceous, of Minnesota, Mesabi district Mon xliii, pp 93-94 
Quartz veins in Alaska, Nome region N and N, pp 143-144 
relation of, to structure in Alaska, Nome region N and N, p 38! 
Quartzite, analysis of, from Minnesota, Mesabi district Mon xliii, p 156 
in Idaho, Snake River Plains Bull 199, p 45 
in Minnesota, Mesabi district Mon xliii, pp 90-93, 154-158 
in Montana, Elkhorn district, petrography of Ann 22, n, pp 544-54o 
in Northwestern States Ann 5, pp 197-202: 
Quebec, platinum in Bull 193, p 36f 
Richelieu River, flow of, measurement of WS 65, pp 38, 40-41; 
Queensland, coal production of MR 1900, pp 315, 319; MR 1901, pp 311, 315 
copper production of MR 1901 , p 19-1 
manganese ore from, statistics of MR 1900, pp 139, 140; MR 1901, pp 154, TM 
Quicksilver, statistics of MR 1900, pp 235-238; MR 1901, pp 235-23* 
Quinn Canyon and Grant ranges, Nevada, geology of Bull 208, pp 68-7(1 
Quinnimont formation in West Virginia GF 77, p 
Raccoon Creek, Ohio, features of Mon xli, p 17S| 
Rafter (G. W. ), relation of rainfall to run-off AVS 
Railroad ballast, use of slag for Bull 213, p 23( 
