160 IKDEX TO PUBLICATIONS OF U. S. GEOL. SURVEY. [bull. 215. 
Nicaragua; rainfall in Ann 22, iv, pp 525-527, 573-579, 583-586 
San Juan River, hydrography of Ann 22, iv, pp 556-573 
temperature and humidity of Ann 22, i v, pp 517-519, 522- 
wind movement in Ann 22, iv, pp 530-534 
Nicaragua Canal route across American isthmus Ann 22, iv, pp 538-540 
hydrography of Ann 22, iv, pp 546-592 
Nickel, ores of MR 1901, pp 971-972 
Nickel and cobalt, statistics of MR 1900, pp 245-249; MR 1901, pp 241-250 
Nigrite in Utah, occurrence, geology, etc., of Ann 22, i, pp 360-361 
Nikolai copper mine, Alaska Copper, pp 86-87 
trails to Copper, pp 23-24, 
Nikolai greenstone of Alaska Copper, pp 33, 40-43 
Nilkoka formation of Alaska Ann 22, in, p 530 
Nineveh limestone and sandstone of Pennsylvania and West Virginia Bull 65, 
pp 32-33 
X i< >l »rara formation of South Dakota GF 85, p 4 
of Kansas, western Bull 202, p 8 
Niobrara River, flow of, measurement of . WS 50, p 311; WS 66, p 25 
Nitrates in water, determination of WS 79, p 26 
Nitrites in water, determination of WS 79, p 25 
Nitrogen, determination of, in sanitary analysis WS 79, pp 24-26 
Niukluk Basin, A laska, gold in N and N, pp 106-1 14 
Nizina River, Alaska, routes east of Copper, p 24 
Nolichucky River, Tennessee, flow of, measurement of WS 48, 
p 185; WS 65, p 300 
hydrography of basin of WS 63, pp 105-llf 
Nolichucky River and tributaries, flow of, measurement of WS 49, pp 212-214 
Nolichucky shale of Tennessee GF 75, p 2 
Nome and adjacent gold fields of Seward Peninsula, reconnaissance of, in 
1900 N and N, pp 1-180 
Nome region, Alaska; Anvil Creek, gold on, discovery of N and N, pp 25-26 
climatic notes on N and N, pp 154-163 
development of N and N, pp 64-6f 
economic geology of N and N, pp 70-91 
mining methods in N and N, pp 151-154 
placers of N and N, pp 70-91, 140-151 
quartz veins in N and N, pp 143-144 
recording districts in N and N, pp 178-180 
topographic survey of, in L900 N and N, pp 174-176 
Nome River and tributaries, Alaska, gold on N and N, pp 73-80 
Nome scries of Alaska, Seward Peninsula PI* 2, pp 17-24; N and N, pp 29-31 
Nordmarkite, analysis of, from Norway, Tonsenas and Auerod Bull 209, p 59 
analysis of, from Quebec, Shefford Mountain Bull 209, p 59 
from Vermont, Ascutney Mountain Bull 209, p 119 
basic segregation in, analysis of, from Vermont, Ascutney Mountain. . .Bull 209, 
P 66 
thin section of, from Vermont, Ascutney Mountain Bull 209, p 58i 
Norfolk quadrangle, Virginia-North Carolina, geology of GF 80 
Noritid;.' of America Mori xlii, pp 49-51 
Normanskill Creek, New York, flow of, measurement of WS 65, pp 53-57 
North America; Vertebrata, fossil, of, bibliography and catalogue of Bull 179 
North Carolina, amethyst in MR 1901 , p 751 
barytes production of MR 1901, pp 916, 918 
beryl, golden, in MR 1901, p 742 
