PROFESSIONAL PAPERS. 
Professional Paper No. 1 [-13] Series A, Economic geology, 16 
B, Descriptive geology, 20 Department of the Interior United 
States Geological Survey Charles D. Walcott, Director Preliminary 
report on the Ketchikan mining district, Alaska with an introduc- 
tory sketch of the geology of southeastern Alaska by Alfred Hulse 
Brooks [Survey design] Washington Government Printing Office 
1902 [-1903] 
• 4°. 13 brochures, "granite" covers. 
1. Preliminary report on the Ketchikan mining district, Alaska, with an intro- 
ductory sketch of the geology of southeastern Alaska, by A. H. Brooks. 
1902. 120 pp., 2 pis. 
2. Reconnaissance of the northwestern portion of Seward Peninsula, Alaska, 
by A. J. Collier. 1902. 70 pp., 11 pis. 
3. Geology and petrography of Crater Lake National Park, by J. S. Diller and 
H. B. Patton. 1902. 167 pp., 19 pis. 
4. The forests of Oregon, by Henry Gannett. 1902. 36 pp., 7 pis. 
5. The forests of Washington, a revision of estimates, by Henry Gannett. 1902. 
38 pp., 1 pi. 
6. Forest conditions in the Cascade Range, Washington, between the Washing- 
ton and Mount Rainier forest reserves, by F. G. Plummer. 1902. 42 pp., 
11 pis. 
7. Forest conditions in the Olympic Forest Reserve, Washington, from notes 
by Arthur Dodwell and T. F. Rixon. 1902. 110 pp., 20 pis. 
8. Forest conditions in the northern Sierra Nevada, California, by J. B. Lei- 
berg. 1902. 194 pp., 12 pis. 
9. Forest conditions in the Cascade Range Forest Reserve, by A. D. Langille, 
F. G. Plummer, Arthur Dodwell, T. F. Rixon, and J. B. Leiberg, with an 
introduction by Henry Gannett. 1903. 298 pp., 41 pis. 
10. Reconnaissance from Fort Hamlin to Kotzebue Sound, Alaska, by way of 
Dall, Kanuti, Allen, and Kowak rivers, by W. C. Mendenhall. 1902. 68 
pp., 10 pis. 
11. Clays of the United States east of the Mississippi River, by Heinrich Ries. 
1903. 298 pp., 9 pis. 
12. Geology of the Globe copper district, Arizona, by F. L. Ransome. 1903. 
168 pp., 27 pis. 
13. Drainage modifications in southeastern Ohio and adjacent parts of West Vir- 
ginia and Kentucky, by W. G. Tight. 1903. Ill pp., 17 pis. 
12 
