Deo., 1916] A Shelf of Geologic Literature 59 



4. Bulletin o")2. Results of trian<i;ulation and ijrimary traverse in 



Ohio, 189<S-iyil, inclusive. R. B. Marshall, Chief Geographer. 

 1914. 232 pp., 2 pis. Distributed free by the Director, U. S. 

 Geological Survey. 



5. Bulletins 411, 47G, 518. Results of spirit leveling in Ohio, describing 



elevations of numerous localities above sea level as shown by 

 permanent l)ench marks. Distributed free by the Director, U. S. 

 Geological Survev. 



-'f,^ 



Topographic Maps. — Most of the topographic maps are 

 published in quadrangles covering areas approximately 13 by 

 173^^ miles, on a scale of about one inch to a mile. These maps 

 show streams, hills and valleys, roads, houses and other surface 

 features. Variations in elevation above sea level are represented 

 by contours of either 10 or 20 feet interval, depending on the 

 relief. The locations of permanent bench marks are also 

 shown. Each quadrangle is designated by the name of some 

 town, village, or geographic feature within it. Topographic 

 maps are sold by postmasters or may be obtained direct from 

 the Survey at a cost of 10 cents each, or 6 cents when ordered in 

 lots of fifty or more maps. An index map showing the locations 

 and names of the quadrangles can be obtained on application 

 to the Director of the Geological Survey. 



It is suggested that each library obtain maps covering its 

 vicinity and have them mounted for hanging on the wall, 

 where they will be brought to the attention of the public. 



(b) Reports of the U. S. Geological Survey on limited 

 areas in Ohio, chiefly of local interest. 



SOUTHERN AND SOUTHWESTERN PART OF STATE. 



1 Water Supply Paper 259. The underground waters of southwestern 

 Ohio. By M. L. Fuller and F. G. Clapp. With a discussion 

 of the chemical character of the waters by R. B. Dole. 1912. 

 228 pp., 9 pis. Distributed free by the Director, U. S. Geological 

 Survey. 



2. Water Supplv Paper 353, Part III. Surface water supplv of the 



Ohio River Basin, 1913. By A. H. Horton, W. E. Hall and H. L. 

 Jackson. 1915. 264 pp., 5 pis. Distributed free by the Director, 

 U. S. Geological Survey. 



3. Folio 184. A report on the geology of the Kenova quadrangle, 



938 square miles, including part of Lawrence County, Ohio, and 

 adjacent areas in Kentucky and West Virginia. By W. C. 

 Phalen. Sold by the Director, U. S. Geological Survey. Library 

 edition, 18 b\' 22 inches, 5 cents; octavo edition, G b}- 9 inches, 

 25 cents. 



