130 INDEX TO PUBLICATIONS OF U. S. GEOL. SURVEY. [bull.215. 
Loess of Iowa, northeastern Ann 11, i, p 234 
Loess and associated silts in Erie and Ohio basins Mon xli, pp 295-301 
Logan conglomerate of Ohio, Kentucky, and Indiana Mon xli, pp 63-64 
Logan River, Utah, flow of, measurement of •_ . Ann 22, iv, pp 408-409; 
WS 51, pp 411-412; WS 66, pp 118-119; WS 75, p 192 
Logan silts of Minnesota, Vermilion district Mon xly, pp 397-422 
Logarithms, five-place, of natural numbers and circular functions, expressed 
in arc and time. (See page 30 of this bulletin.) 
Lone Mountain limestone of Nevada Bull 208, p 20 
Long Valley Range, Nevada, geology of Bull 208, pp 54-57 I 
Lookout conglomerate of Tennessee : . . Ann 22, in, pi xiii, p 235 
Lookout sandstone of Georgia GF 78, p 4 i 
Los Angeles River, flow of, measurement of WS 51, 
pp 464-471, 482-483: WS 66, pp 160-161 
Los Moras Creek, Texas, hydrographic data concerning WS 50, pp 344-345 
Los Pinos River, Colorado, flow of, measurement of Ann 22, iv, p393; WS 50, pp 
382-383; WS 66, pp 95-96; WS 74, pp 118-119, 126; WS 75, p 176 
Lost Gulch monzonite of Arizona, Globe district PP 12, pp 75-78 
Louisiana; Anse la Butte oil district Bull 212, pp 130-131 
borings, deep, in, list of WS 57, pp 49-50 
building stone from, statistics of. ..MR 1900, p 662 et seq; MR 1901, p 643 et seq . : 
clay products of, statistics of MR 1900, p 695 et seq; MR 1901, p 674 et seq 
gas wells in Bull 184, pp 59-60 
Gulf Coastal Plain, geology of Bull 212, pp 15-67 
Hackberry Island oil well Bull 212, pp 131-133 
Jennings oil district Bull 212, pp 127-130 
map, geologic, of Bull 184, p 38 
oil fields of, geology, etc. , of Bull 212 
of Gulf Coastal Plain Bull 213, pp 345-352 
petroleum in, occurrence of MR 1901, p 564 
sandstone production of MR 1900, 
pp 662, 670, 671, 672; MR 1901, pp 643,. 644, 656, 657, 658, 659 
sulphur oil district Bull 212, pp 133-135 
topography of Gulf Coastal Plain Bull 212, pp 13-15 
Louisiana limestone of Ozark region Ann 22, n, p 86 
Loup River, Nebraska, flow of, measurement of Ann 22, 
iv, p 328; WS 50, pp 306-307; WS 66, pp 38-39; WS 75, p 137 
Lower Barren Measures. (See Conemaugh group. ) 
Lower Coal Measures, clays of PP 11 , pp 52-54 
of Iowa, northeastern Ann 11, i, p 234 
of West Virginia, clays of PP 11, pp 253-258 j 
Lower Huronian. (See Huronian.) 
Lower Magnesian group of Illinois GF 81, p 2 
Lower Magnesian limestone in Wisconsin Ann 7, p 394; Ann 11, i, p 332 
Lower Productive Measures of Pennsylvania, clay of PP 11, pp 215-230 
Lumbering in Appalachian Mountain region Ann 22, iv, p 178; WS 62, pp 25-30 
Lytle Creek, California, flow of, measurement of ..WS 66, pp 162-163; WS 75, p 223 
Lytton formation of Texas GF 76, p 6 
McAlester shale of Indian Territory. .Ann 22, in, p 377, pi xxvi; GF 74, p 3; GF 79, p 5 
McChesney (J. D. ), work in charge of Ann 22, i, pp 203-205; Ann 23, pp 191-194- 
McDonald Lake, Montana, description of Ann 22, iv, pp 436, 439-441 1 
Machias Rivers, Maine, hydrographic data concerning WS 69, pp 113-114 
Madagascar, precious stones of MR 1901, pp 766-769 
Madera diorite of Arizona, Globe quadrangle PP 12, pp 58-65 
