56 The Ohio Journal of Science [Vol. XVII, No. 2, 



(d) Mineralogy and petrography (one of the first two and 

 one of the second two should be selected). 



1. Moses, A. J., and Parsons, C. L. Elements of Mineralogy, Crystal- 



lography and Blowpipe Analysis, 389 pages. I. Van Nostrand 

 Company, New York, 4th cd.^ 1909. Price $2.50. 



2. Brush, G. J., and Penfield, S. L. Manual of Determinatiye Min- 



eralogy, 312 pages. John Wiley & Sons, New York, 10th ed.. 

 1903. ' Price .$4.00. 



3. Kemp, J. F. Handbook of Rocks, 272 pages. D. Van Nostrand 



Company, 5th ed., 1911. Price $1.50. 



4. Merrill, George P. Treatise on Rocks, Rock Weathering and Soils, 



400 pages. The Macmillan Company, 2nd ed., 1906. Price 

 $4.00. 



(e) Principal periodicals devoted wholly or in part to 

 geology, not essential to the small library, but of interest to 

 the geologist. 



1. Journal of Geology. Published semi-quarterly. The University of 



Chicago Press. Subscription $4.00 per year. 



2. Economic Geolog}'. Published semi -quarterly. Devoted to geology 



as applied to mining and allied industries. The Economic 

 Geology Pubhshing Company. Subscription $3.00 per year. 



3. Bulletin of the Geological Society of America. Published quarterly. 



Subscription $7.50 per year. 



4. American Journal of Science. Published monthly at New Haven, 



Conn. Subscription $0.00 per year. 



5. Bulletin of the American Institute of Mining Engineers. Published 



monthly in New York. Subscription $10.00 per year. 



A Few Books of General Educational Interest Published 

 BY THE U. S. Geological Survey and Bureau 



OF Mines. 



1. Professional Paper No. 00, U. S. Geological Survey. The Interpre- 



tation of Topographic Maps. By R. D. Salisbury and W. W. 

 Atwood, 1908. 84 pp., 170 pis. Sold by the Superintendent 

 of Documents, Washington, D. C, for $2.75. 



2. Professional Paper 71, U. S. Geological Survey. Index to Stratig- 



raphy of North America. By Bailey Willis. Accompanied by a 

 geologic map of North America. Compiled from various sources. 

 1912. 894 pages, 1 pi. Sold by the Superintendent of Docu- 

 ments, Washington, D. C, for $2.00. 



3. Bulletin 61G, U. S. Geological Survey, 1910. The Data of Geo- 



chemistry. Third edition. By F. W. Clarke. 821 pages. 

 Available for free distribution by the Survey. 



