Bulletin 434. Results of spirit leveling in Delaware, District of Columbia, Maryland, and Virginia, 1896 to 1909. R. B. Marshall, chief geographer. 1910. 74 pp.

Gives the elevation above sea level of about 600 points in the area considered, arranged by quadrangles. The work in Maryland and that in Virginia during a part of the year 1908 was done in cooperation with the States.

Bulletin 435. A reconnaissance of parts of northwestern New Mexico and northern Arizona, by N. H. Darton. 1910. 88 pp., 17 pls., 8 text figures. A detailed description of the geology of the Rio Grande Valley and the Grand Canyon of the Colorado region, undertaken to determine the prospects for obtaining deep-seated underground water supplies. The peculiar formations of the Grand Canyon are described, the mineral resources of the region are considered briefly, and numerous well records are given.

Bulletin 436. The fauna of the phosphate beds of the Park City formation in Idaho, Wyoming, and Utah, by George H. Girty. 82 pp., 7 pls.

Descriptions of invertebrate fossils found in the phosphate beds near Park City, Utah, with illustrations showing the forms discovered.

Bulletin 437. Results of spirit leveling in Maine, New Hampshire, and Vermont, 1896 to 1909, inclusive. R. B. Marshall, chief geographer. 59 pp. 1910. Gives elevations of about 500 points, arranged by quadrangles. The work in Maine was done in cooperation with the State from 1899 to 1909, inclusive. Bulletin 438. Geology and mineral resources of the St. Louis quadrangle, Missouri-Illinois, by N. M. Fenneman. 1911. 73 pp., 6 pls., 1 text figure. A brief geologic history of the district and descriptions of its topography, stratigraphy, and mineral resources. Contains a geologic map of the quadrangle and illustrations showing the structure and some other geologic features. The coal, clay, quarry rock, oil, gas, sand, gravel, and water resources of the quadrangle are described in connection with its economic geology.

Bulletin 439. The fauna of the Morefield shale of Arkansas, by George H. Girty. 1911. 148 pp., 15 pls.

Descriptions of invertebrate fossils of an important section of Mississippian rocks. The species are considered individually and in detail, and most of the forms are illustrated in the plates.

Bulletin 440. Results of triangulation and primary traverse for the years 1906,

1907, and 1908. R. B. Marshall, chief geographer. 1910. 668 pp., 1 pl. Gives the results of triangulation and primary traverse in the United States from 1906 to 1908, inclusive, listing 716 triangulation stations and 6,243 primary traverse statiors, nearly all on United States standard datum. The bulletin includes a map showing the condition of astronomic location and primary control to January 1, 1909.

Bulletin 441. Results of spirit leveling in Alabama, Georgia, North Carolina, South Carolina, and Tennessee, 1896 to 1909, inclusive. R. B. Marshall, chief geographer. 1911. 145 pp.

Gives the elevations of about 1.300 points in the States named. The report includes all leveling by the Geological Survey in this area, arranged by quadrangles. The work in Alabama from 1899 to 1905 and in North Carolina in 1896 and from 1902 to 1909 was done in cooperation with those States.

Bulletin 442. Mineral resources of Alaska-report on progress of investigations in 1909, by Alfred H. Brooks and others. 1910. 432 pp., 8 pls., 8 text figures.

An annual report on the work of the Geological Survey in Alaska. Includes, in addition to an administrative report, a large number of special reports on various features of the work, among which are papers on the mining industry in 1909, the utilization of Alaskan coal, the preparation and use of peat as a fuel, and the auriferous quartz veins of the Fairbanks district. The report includes papers having the following titles:

Administrative report, by Alfred H. Brooks.

The mining industry in 1909, by Alfred H. Brooks.

Alaska coal and its utilization, by Alfred H. Brooks.

The preparation and use of peat as a fuel, by Charles A. Davis.

Mining in southeastern Alaska, by Adolph Knopf.

Occurrence of iron ore near Haines, by Adolph Knopf.

Report of water-power reconnaissance in southeastern Alaska, by John C. Hoyt.

Mining in the Chitina district, by Fred H. Moffit.

Mining and prospecting on Prince William Sound in 1909, by U. S. Grant. Preliminary report on the mineral resources of the southern part of Kenai Peninsula, by U. S. Grant and D. F. Higgins.

Outline of the geology and mineral resources of the Iliamna and Clark lakes region, by G. C. Martin and F. J. Katz.

Gold placers of the Mulchatna, by F. J. Katz.

Sketch of the geology of the northeastern part of the Fairbanks quadrangle, by L. M. Prindle.

The auriferous quartz veins of the Fairbanks district, by L. M. Prindle. Placer mining in the Yukon-Tanana region, by C. E. Ellsworth.

Occurrence of wolframite and cassiterite in the gold placers of Deadwood Creek, Birch Creek district, by Bertrand L. Johnson.

Water supply of the Yukon-Tanana region, 1909, by C. E. Ellsworth.

The Koyukuk-Chandalar gold region, by A. G. Maddren.

Mineral resources of the Nulato-Council region, by Philip S. Smith and Henry M. Eakin.

Mining in Seward Peninsula, by Fred F. Henshaw.

Water-supply investigations in Seward Peninsula in 1909, by Fred F. Henshaw.

Bulletin 443. Reconnaissance of the geology and mineral resources of Prince William Sound, Alaska, by U. S. Grant and D. F. Higgins. 1910. 89 pp., 12 pls., 9 text figures.

Contains detailed descriptions of the many copper mines and prospects of the district and notes on the occurrence of gold and other metals of commercial importance. The topography and general geology of the region are fully considered and the report is accompanied by a large-scale geologic map. Bulletin 444. Bibliography of North American geology for 1909, with subject index, by John M. Nickles. 1910. 174 pp.

A list, arranged alphabetically by authors' names, of publications bearing on the geology of North America, the adjoining islands, Panama, and the Hawaiian Islands, with summaries of many of the publications. The work is indexed and includes lists of chemical analyses and of minerals, rocks, and geologic formations described.

Bulletin 445. Geology of the pegmatites and associated rocks of Maine, including feldspar, quartz, mica, and gem deposits, by Edson S. Bastin. 1911. 152 pp., 19 pls., 8 text figures.

Describes in detail the general geology and the specific occurrence of pegmatites in Maine and the relations of granites and pegmatites, and discusses at length the economically important pegmatite minerals, in respect to their occurrence, uses, production, and prices. Among these minerals are feldspar, quartz, mica, tourmaline, and beryl.

Bulletin 446. Geology of the Berners Bay region, Alaska, by Adolph Knopf. 1911. 58 pp., 2 pls., 4 text figures.

A report on the geology and ore deposits of the Berners Bay region, at the northwest extremity of the Juneau gold belt, describing the mines and prospects of the region and the mineralogy of the ore deposits. Mr. Knopf's report shows that the mineralization of south-central Alaska was synchronous with that of the Mother Lode district in California.

Bulletin 447. Mineral resources of Johnstown, Pa., and vicinity, by W. C. Phalen and Lawrence Martin. 1911. 142 pp., 7 pls., 22 text figures.

A full discussion of the geology of this important coal-bearing region, with descriptions of its mineral resources. Coal and clay, the most valuable resources, are treated in detail by districts, and many analyses of coal and clay from particular districts are given. The occurrence of glass sand, building stone, lime, cement, and iron ores is also discussed.

Bulletin 449. A geologic reconnaissance in southeastern Seward Peninsula and the Norton Bay-Nulato region, Alaska, by P. S. Smith and H. M. Eakin. 1911. 146 pp., 13 pls.

A report on the geography, geology, climate, vegetation, and mineral resources of a hitherto unexplored district. Illustrated by maps and half-tone plates. The gold placers and lode prospects of the region are described in detail, and the coal exposures are also considered.

Bulletin 452. The Lander and Salt Creek oil fields, Wyoming: The Lander oil field, Fremont County, by E. G. Woodruff; The Salt Creek oil field, Natrona County, by C. H. Wegemann. 1911. 87 pp., 12 pls., 1 text figure.

Descriptions of the stratigraphy and structure of the two fields and full accounts of the oil origin, condition of development, and available markets, with large-scale maps of the oil fields.

Bulletin 453. Results of spirit leveling in Minnesota, 1897 to 1910, inclusive.

R. B. Marshall, chief geographer. 1911. 39 pp., 1 pl.

A report on precise and primary leveling in the State, showing the altitudes above sea level of more than 600 places. The work in 1909 and 1910 was done in cooperation with the State of Minnesota. This and similar bulletins contain a half-tone illustration showing designs for bench marks used by the United States Geological Survey, and all elevations are arranged by quadrangles.

Bulletin 457. Results of spirit leveling in the State of Washington, 1896 to 1910, inclusive. R. B. Marshall, chief geographer. 1911. 108 pp., 1 pl.

A report on precise and primary leveling in the State, showing the altitudes above sea level of more than 1,800 places. The work in 1909 and 1910 was done in cooperation with the State of Washington.

Bulletin 459. Results of spirit leveling in Missouri, 1896 to 1909, inclusive. R. B. Marshall, chief geographer. 1911. 48 pp., 1 pl.

A report on precise and primary leveling in the State, showing the altitudes above sea level of more than 450 places. The work from 1907 to 1909, inclusive, was done in cooperation with the State.

Bulletin 460. Results of spirit leveling in Iowa, 1896 to 1909, inclusive. R. B. Marshall, chief geographer. 1911. 32 pp., 1 pl.

A report on precise and primary leveling in the State, showing the altitudes above sea level of more than 250 places. The work from 1907 to 1909, inclusive, was done in cooperation with the State.

Bulletin 461. Results of spirit leveling in Michigan and Wisconsin, 1897 to 1909, inclusive. R. B. Marshall, chief geographer. 1911. 64 pp., 1 pl.

A report on precise and primary leveling in the two States, showing the altitudes above sea level of more than 550 places. The work from 1901 to 1909, inclusive, was done in cooperation with the States.

Bulletin 462. Results of spirit leveling in Oregon, 1896 to 1910, inclusive. R. B. Marshall, chief geographer. 1911. 82 pp., 1 pl.

A report on precise and primary leveling in the State, showing the altitudes above sea level of more than 750 places. The work from 1905 to 1910, inclusive, was done in cooperation with the State.

Bulletin 463. Results of spirit leveling in Arizona, 1899 to 1909, inclusive. R. B. Marshall, chief geographer. 1911. 94 pp., 1 pl.

A report on precise and primary leveling in the State, showing the alti tudes above sea level of more than 800 places.

Bulletin 465. The State geological surveys of the United States, compiled under the direction of C. W. Hayes. 1911. 177 pp.

Brief sketches of the origin and history of the geological surveys in the several States and Territories of the United States, their organization, and the laws governing them, with statements showing the amounts appropriated and the purposes for which they have been expended. Compiled from reports submitted by the State geologists or by other officials of the surveys. Advance chapters from Bulletin 470, "Contributions to economic geology (short papers and preliminary reports), 1910-Part I, Metals and nonmetals except fuels," as follows:

Bulletin 470-A. Phosphates in Montana, by Hoyt S. Gale. 1911. 7 pp., 2 text figures.

A report on the location and structure of phosphate deposits at Melrose, Mont., with reference to their value and accessibility.

Bulletin 470-D. Lead and zinc, by R. W. Richards and Howland Bancroft.

1911. 30 pp., 4 text figures.

Papers on the lead and zinc deposits in the Metaline mining district, Washington, and the lead and copper deposits in the Bear River Range, Idaho and Utah, with a list of Survey publications on lead and zinc. Bulletin 470-E. Rare metals, by F. L. Hess. 1911. 12 pp., 1 text figure.

Includes a report on the arsenic deposits at Brinton, Va., and a list of Survey publications on antimony, chromium, monazite, nickel, platinum, quicksilver, tin, tungsten, uranium, and vanadium.

Bulletin 470-F. Iron and manganese, by Charles Butts. 1911. 22 pp., 4 text figures.

A report on the iron ores in the Montevallo-Columbiana region, Alabama, with sketch maps showing the location of the deposits and a list of Survey publications on iron and manganes.

Bulletin 470-I. Mineral paints, by B. L. Miller. 1911. 15 pp.

A paper on the paint shales of Pennsylvania and a list of Survey publications on mineral paints.

Bulletin 470-J. Sulphur and pyrite, by R. W. Richards and J. H. Bridges. 1911. 8 pp., 1 text figure.

A report on the sulphur deposits near Soda Springs, Idaho, and a list of Survey publications on sulphur and pyrite.

Bulletin 470-K. Miscellaneous nonmetallic products. 1911. 45 pp., 6 text figures. Contains the following papers:

The types, modes of occurrence, and important deposits of asbestos in the United States, by J. S. Diller.

Dolomite for flux in the vicinity of Montevallo, Shelby County, Ala., by Charles Butts.

Graphite near Dillon, Mont., by A. N. Winchell.

Fluorspar near Deming, N. Mex., by N. H. Darton and E. F. Burchard. Water-Supply Paper 237. The quality of the surface waters of California, by Walton Van Winkle and Frederick M. Eaton, in cooperation with the California Department of Engineering. 1910. 142 pp., 1 pl.

A description of the drainage of the State, with analyses and assays of surface waters and general conclusions regarding the adaptability of the waters of the several streams for various uses.

Water-Supply Paper 240. Geology and water resources of the San Luis Valley, Colorado, by C. E. Siebenthal. 1910. 128 pp., 13 pls., 15 text figures. A comprehensive view of the geology of the San Luis Valley and the surrounding rim, with a description of the artesian basin, its development and its prospects, and information in regard to climate, agriculture, irrigation, and water resources.

Water-Supply Paper 246. Surface water supply of the United States, 1907-8: Part VI, Missouri River basin, prepared under the direction of M. O. Leighton by Robert Follansbee and J. E. Stewart. 1910. 311 pp., 13 pls., 2 text figures.

Water-Supply Paper 251. Surface water supply of the United States, 1907-8: Part XI, California, prepared under the direction of M. O. Leighton by W. B. Clapp and W. F. Martin. 1910. 363 pp., 7 pls., 1 text figure. Water-Supply Papers 246 and 251 contain the results of stream measurements in the United States during the calendar years 1907 and 1908, continuing the Survey's series of reports on stream gagings. These papers give gage-height records, results of current-meter measurements, rating tables, and estimates of monthly discharges at stations maintained, on many streams. Water-Supply Paper 253. Water powers of the Cascade Range-Part I, South

ern Washington, by J. C. Stevens. 1910. 94 pp., 21 pls., 3 text figures. The first of a proposed series of reports dealing with the water powers on rivers flowing from the Cascade Range in Washington and Oregon. The area treated in this paper comprises the drainage basins of Klickitat, White Salmon, Little White Salmon, Lewis, and Toutle rivers and is located in the southern extremity of the Cascade Range in Washington. Descriptions of the several drainage areas are given, together with profiles of the streams and principal tributaries, discharge data, and detailed statements of the water powers capable of being developed at the average minimum stage of the streams,