ADVERTISEMENT. Ill 
PP 19. Contributions to the geology of Washington, by G. O. Smith and Bailey Willis. 1903. 101 pp., 
20 pis. 
PP 21. The geology and ore deposits of the Bisbee quadrangle, Arizona, by F. L. Ransome. 1904. 168 
pp., 29 pis. 
PP 24. Zinc and lead deposits ol* northern Arkansas, by G. I. Adams, assisted by A II. Purdue and 
E. F. Burchard. 1904. 118 pp., 27 pis. 
PP 31. Preliminary report on the geology of the Arbuckle and Wichita mountains in Indian Territory 
and Oklahoma, by J. A. Taff; with an appendix on reported ore deposits in the Wichita 
Mountains, by H. F. Bain. 1904. 97 pp., 8 pis. 
PP 32. Preliminary report of the geology and underground water resources of the central Great Plains, 
by N. H. Darton. 1905. — pp., 72 pis. 
B 244. Contributions to Devonian paleontology, 1903, by H. S. Williams and E. M. Kindle. 1905. 144 
pp., 4 pis. 
Correspondence should be addressed to 
The Director, 
United States Geological Survey, 
Washington, D. C. 
January, 1905. 
