12S THE UNITED STATES GEOLOGICAL SURVEY. !.bull.227J 
Twenty-first Annual Report of the l T . S. Geological Survey, etc.— Continued, 
l't. III. General geology, ore and phosphate deposits, Philippines, oil pp., 68 pis. 
The Newark system of the Pomperautf Valley, Connecticut, by \V. II. Hobbs, with a 
report on fossil wood from the Newark formation of South Britain, Conn., by F. H. 
Knowlton, pp. 7-162, pis. i-xvii. 
Laccoliths of the Black Hills, by T. A. Jaggar, jr., with a chapter on experiments illus- 
trating intrusion and erosion, by Ernest Howe, pp. 163-303, pis. xviii-xlvii. 
Iron-ore deposits of Lake Superior region, by C. R. Van Hise, pp. 305-434, pis. xlviii-lix. 
Arkansas bauxite deposits, by C. W. Hayes, pp. 435-472, pis. lx-lxiv. 
Tennessee white phosphate, by C. W. Hayes, pp. 473-485. pi. Ixv. 
Report on geology of the Philippine Islands, by G. F. Becker, followed by a version (by 
Mr. Becker) of Ueber Tertiare Fossilien von den Philippinen, by K. Martin, j>p. 4874 
623, pis. lxvi-lxviii. 
Index, pp. 627-644. 
Pt. IV. Hydrography, 768 pp., 156 pis. 
Report of progress of stream measurements for the calendar year 1899, by F. H. Newell!! 
pp. 9-488, pis. i-lvii. 
Preliminary description of the geology and water resources of the southern half of the 
Black Hills and adjoining regions in South Dakota and Wyoming, by N. H. Darton, 
pp. 489-599, pis. Iviii-cxii. 
The High Plains and their utilization, by W. D. Johnson, pp. 601-741, pis. cxiii-clvi. 
Index, pp. 713-768. 
Pt. V. Forest reserve, 711 pp., 143 pis. (39 maps in separate case). 
Summary of forestry work in 1899-1900, by Henry Gannett, pp. 9-25, pi. 1. 
Lewis and Clarke Forest Reserve, Montana, by H. B. Ayres, pp. 27-80, pis. ii-xxxii. 
Mount Rainier Forest Reserve, Washington, by F. G. Plummer, pp. 81-143, pis. xxxiii-1. 
Olympic Forest Reserve, Washington, from field notes by Arthur Dodwell and T. F. 
Rixon, pp. 145-208, pis. li-lxx. 
Cascade Range Forest Reserve, Oregon, from T. 28 S. to T. 37 S., inclusive, together with 
the Ashland Forest Reserve and adjacent forest regions from T. 28 S. to T. 41 S., inclll 
sive, and from R. 2 W. to R. 14 E., Willamette meridian, inclusive, by J. B. Leiberg, 
pp. 209-498, pis. lxxi-lxxxiv. 
Stanislaus and Lake Tahoe forest reserves, California, by G. B. Sudworth, pp. 499-561, 
pis. lxxxv-cxiv. 
Classification of lands, by Henry Gannett, including papers by C. H. Fitch, R. B. Mar- 
shall, E. C. Barnard, and J. B. Leiberg, pp. 563-601, pis. cxv-cxli. 
Woodland of Indian Territory, by C. H. Fitch, pp. 603-662, pi. cxlii. 
Timber conditions of the pine region of Minnesota, by H. B. Ayres, pp. 673-689, pi. cxlii. 
Index, pp. 691-711. 
Pt. VI. Mineral resources of the United States, 1899: Metallic products, coal, and coke, viii, 
656 pp. 
Pt. VI (Continued). Mineral resources of the United States, 1899: Nonmetallic products, except; 
coal and coke, viii, 634 pp. 
Pt. VII. Geography and geology of the Black and Grand prairies, Texas, with detailed descrip- 
tions of the Cretaceous formations and special reference to artesian waters, by R. T. 
Hill, 666 pp., 71 pis. 
Tw T enty-second Annual Report of the United States Geological Survey, 1900-1901, 
Charles I). Walcott, Director. 1901. (Parts III and IV, 1902.) 8°. 4 pts. 
Pt. I. Director's report and a paper on asphalt and bituminous rock deposits, 464 pp., 58 pis. 
Director's report, pp. 1-207, pis. i-xxiv. 
Asphalt and bituminous rock deposits of the United States, by G. H. Eldridge, pp. 209- 
452, pis. xxv-lviii. 
Index, pp. 453-464. 
II. Ore deposits, 888 pp., 82 pis. 
Old tungsten mine at Trumbull, Conn., by W. H. Hobbs, pp. 7-22, pis. i-v. 
Preliminary report on the lead and zinc deposits of the Ozark region, by H. F. Bain, 
with an introduction by C. R. Van Hise, and chapters on the physiography and geology 
by G. I. Adams, pp. 23-228, pis. vi-xxv. 
The ore deposits of the Rico Mountains, Colorado, by F. L. Ransome, pp. 229-398, pis. 
xxvi-xli. 
Geology and ore deposits of Elkhorn mining district, Jefferson County, Mont., by W. H. 
W 7 eed, with an appendix on the microscopical petrography by Joseph Barrell, pp. 
399-550, pis. xlii-lxii. 
The gold belt of the Blue Mountains of Oregon, by Waldemar Lindgren, pp. 551-776, 
pis. Ixiii-lxxviii. 
The ore deposits of Monte Cristo, Wash., by J. E. Spurr, pp. 777-866, pis. lxxix-lxxxii. 
Index, pp. 867-888. 
Pt. 
