INDEX. 
447 
Page. 
Park City mining district, Utah, climate 
of 33 
geography of 32-33 
geology of 35^0 
history of. 34-35 
igneous rocks in . 37 
mining operations in 38-39 
ores of... 39-40 
production of 35 
timberin 33 
water in 32 
Patoka quadrangle, Indiana-Illinois, coal 
in 290-293 
Paving blocks, manufacture of, from iron 
slag, methods of 224 
Pearl, Colo., copper deposits at 163-169 
Peat, publications concerning 294-295 
Pedro Creek, Alaska, gold mining on 47 
Penfleld and Wells, cited 94 
Penrose, R. A. F., cited 232 
Pennsylvania, coal fields of, area and pro- 
duction of 257, 258, 260 
coal fields of, work in 270-275 
slate beds in 361-364 
work in 30 
Peshastin mining district, Washington, 
gold deposits of... 78-79 
Petersburg coal, Indiana, analyses of 286 
character and thickness of 285-286, 289 
Petrolene, features of 299 
Petroleum, accumulation of, conditions 
favoring 347-348 
deposits of, California 306-321 
Colorado. 322-332 
Gulf Coast, character and utiliza- 
tion of 351-852 
Indiana 333 
investigations of. 30 
Ohio 336-344 
publications concerning, list of 356 
Pickart coal mine, Yukon River, Alaska, 
conditions at. 280-281 
Piney Fork oil district, Ohio, develop- 
ments in 341 
Pinson, Tenn., clay pits near 386-388 
Pioneer Creek, Alaska, gold deposits on . 50, 55 
Phosphates, deposits of, Florida, investi- 
gations of 29 
deposits of, Tennessee, investigations 
of 29,418-425 
origin of 419 
publications concerning, list of 426 
Phosphate rock, analysis of 425 
Placer gold, Alaska, distribution and 
source of 41-44 
Platinum, deposits of, Wyoming 94-97 
pu blications concerning 22, 104 
Plasterco, Va. , gypsum deposits at 412 
Ponupo mines, Cuba, manganese deposits 
at 253-255 
Porcupine district, Alaska, gold mining 
in.... 48 
Pratt, N. P., acknowledgments to 63 
Professional Papers of U. S. Geological 
Survey, character of 10 
Puente Hills, California, oil field in .... 319-321 
Page. 
Purington, C. W., work done by 19 
Pyrite, analysis of. 63 
deposits of, Georgia 62-63 
Kansas 200 
Missouri 200 
Utah H3-114 
Pyrite and marcasite, bulletin on, title 
and noticeof 20 
Q. 
Quicksilver, publications concerning, list 
of 104 
Quincy, Fla., fuller's earth beds near .. 396-397 
R. 
Railroad ballast, use of iron slag for . . . 230-231 
Rambler mine, Wyoming, platinum at. . . 94-97 
Rampart, Yukon River, Alaska, coal beds 
near 280 
gold miningat 47 
Ransome,F.L., paper by 149-157 
bulletin by, title and notice of 19 
paper by, title and notice of 21 
work done by 19,21 24 
Redbank Creek, Tennessee, phosphate de- 
posits on 418 
Redding region, California, Afterthought 
district of 126 
Black Diamond district of 130-131 
Bully Hill district of 126-130 
copper deposits of 123-132 
Iron Mountain district of 131-132 
iron ores of 219-220 
limestone beds in 365 
rocks of 123-126 
Rhode Island Creek, Alaska, gold indica- 
tions on 50,53-54 
Rice Mountains, Colorado, report made 
on ore deposits of 21 
Richardson, Clifford, cited 297,299 
Richardson, G. D., cited 274 
Ries, Heinrich, analyses by 393, 395 
cited 395 
work done by 30 
River Junction, Fla., fuller's earth depos- 
its near . 394-395 
Riverside, Ariz., cement rocks near 378 
Road metal, use of iron slag for 230 
Roan Creek, Tennessee, phosphate depos- 
its on. 423 
Robertson, W. B., acknowledgments to.. 408 
Rock, A.M., work done by 24, 149 
Rock Creek coal, Indiana, character and 
thickness of 288,200 
Round Top claim, Pearl, Colo., copper de- 
posits at 167 
Rubble, stone available for, Illinois 358-360 
Ruby Creek, Alaska, gold mining on 55 
S. 
Sag Bridge, 111., paving stone at 358 
Sahlin, A., cited... 228 
Salt, analyses of.. 413-414 
deposits of, Virginia 406-416 
publications concerning, list of 417 
