SERIES LIST. HI 
B 316. Contributions to economic geology, 1906, Part II: Coal, lignite, and peat; M. R.Campbell, 
geologist in charge. 1907. — pp., 23 pis. 
B 323. Experimental work conducted in the chemical laboratory of the United States fuel-testing 
plant at St. Louis, Mo., January 1, 1905, to July 31, 1906. by X. \Y. Lord. 1907. -19 pp. 
SERIES Q, FUELS. 
B 261. Preliminary report of the operations of the coal-testing plant of the United states Geological 
Survey at the Louisiana Purchase Exposition, St. Louis, Mo., 1901; E. W. Parker, J. A.Holmes, 
M. R. Campbell, committee in charge. 1905. 172 pp. 
PP 48. Report on the operations of the coal-lesting plant of the United States Geological Survey at the 
Louisiana Purchase Exposition, St. Louis, Mo., 1904; E. W. Parker, J. A. Holmes, M. R. Camp- 
bell, committee in charge. 1906. 3 parts. 1,492 pp., 13 pis. 
B 290. Preliminary report on the operations of the fuel-testing plant of the United States Geological 
Survey at St. Louis, Mo., 1905, by J. A. Holmes. 1906. 240 pp. 
B 3:23. Experimental work conducted in the chemical laboratory of the United states fuel-testing 
plant at St. Louis, Mo., January 1, 1905, to July 31, 1906, by N. W. Lord. 1907. 49 pp. 
Correspondence should be addressed to 
The Director, 
United States Geological Survey, 
Washington-, D. C. 
September, 1907. 
O 
