172 INDEX TO PUBLICATIONS OF U. S. GEOL; SURVEY. 
[BULL. 21! 
Pennsylvania; natural gas in, statistics of MR 1900, pp 034, 
635,037,038,039-040; MR 1901, pp 017, 019, 020, 021, 022-023 
natural gas in Masontown and Uniontown quadrangles GF 82, pp 18-19 
Neshaminy Creek, flow of, measurement of Ann 22, 
iv, pp 110-119; WS 47, pp 90-98; WS 05, p 210; WS 75, p 29 
rainfall, run-off, and evaporation in basin of WS 80, pp 93, 99 
nickel in MR 1901, p 242 
oil field, Gaines Ann 22, in, pp 573-027 
paint, mineral, production of MR 1900, pp 881, 885; MR 1901, pp 903,907 
Pennsylvania ("anal, flow of, measurement of WS 48, p 114 
Perkiomen Creek, flow of, measurement of Ann 22, 
iv, pp 121-123; WS 47, pp 98-99; WS 05, p 217; WS 75, p 29 
rainfall, run-off, and evaporation in basin of WS 80, pp 94, 99 
petroleum in Masontown and Uniontown quadrangles GF 82, pp 19-20 
statistics of MR 1900, 
pp 540, 541, 542, 543, 545; MR 1901, pp 530, 531, 532, 533, 549-559 
phosphate rock in, statistics of MR 1900, p 805; MR 1901, pp 813, 819 
platinum in Bull 193, pp 33, 59 
salt production of MR 1900, p 837; MR 1901, p 855 
sandstone production of MR 1900, 
pp 002, 070, 071, 072, 075; MR 1901, pp 044, 045, 050, 057, 058, 059 
Schulykill River, flow of, measurement of WS 48, pp 109-110; WS 05, p 219 
slate production of MR 1900, 
pp 002, 077, 078, 081; MR 1901, pp 044, 045, 000, 001 
Slatington, slate industry at Bull 213, pp 301-363; 
stone in Masontown and Uniontown quadrangles GF 82, p 20 
Susquehanna River, flow of, measurement of Ann 22, iv, pp 124-129; 
WS 48, pp 110-114; WS 05, pp 220-228; WS 75, pp 30-31, 32 
talc and soapstone in, statistics of MR 1900, p 783; MR 1901, p 777 
Tohickon Creek, flow of, measurement of Ann 22, 
iv, pp 113-110; WS47, pp 81-89; WS 05, p 215; WS 75, p 28 
rainfall, run-off, and evaporation in basin of WS 80, pp 95, 99 
topographic work in Ann 22, 
i, pp 137, 138, 140, 148-149, 151, 173; Ann 23, pp 120, 133-134 
cooperation of States in Ann 22, i , pp 19, 25, 29 
topography of Gaines oil field Ann 22, in, pp 580-581 
of Masontown and Uniontown quadrangles GF 82, pp 2-5 
Uniontown and Masontown quadrangles, geology of GF 82 
Wissahickon Creek, flow of, measurement of Ann 22, 
iv, p 124; WS 48, pp 107-109; WS 65, p 218; WS 75, p 30 
Youghiogheny River, abandoned channels along GF 82, p 4 
Pennsylvania Canal, flow of, measurement of WS 48, p 1 14 
Pennsylvanian series of Pennsylvania GF 82, pp 7-9 
of West Virginia, Raleigh quadrangle GF 77, pp 3-4 
Penobscot River, flow of, measurement of W 7 S 05, pp 14-15; WS 75, p 20 
water power, etc. , on WS 09, pp 27-38 
Penokee-Gogebic iron belt of the Northwestern States Ann 5, pp 194-196 
Penokee-Gogebic region of northern Wisconsin and Michigan, unconformities 
of Ann 7, pp 423-428 
Penokee series of Michigan and Wisconsin Ann 15, pp 93-94; Bull 8, pp 30-32 
Pensauken formation of New York City district GF 83, p 1 1 
Peorian soil and weathered zone in Erie and Ohio basins Mon xli. pp 302-303 
Pequanac River, New Jersey, flow of, measurement of WS 72, pp 22-24 
rainfall, run-off, and evaporation in basin of WS 80, pp 97, 99 
