84 Scientific Intelligence. 



A Section on the Quaternary ; by S. R. Capps. Pp. 64, 5 plates, 

 3 fisjfures. 



No. 419. Analysis of Rocks and Minerals from the Laboratory 

 of the United States Geological Survey, 1880 to 1908 ; tabulated 

 by F. W. Clakke. Pp. xli, 323. 



No. 420. Economic Geology of the Feldspar Deposits of the 

 United States; by Edson S. Bastin. Pp. 85, 4 plates. 



No. 422. The Analysis of Silicate and Carbonate Rocks: A 

 Revision of Bulletin 305 ; by VV. F. Hillkbeand. Pp. 239, 27 

 figures. 



No. 428. Tbe Purchase of Coal by the Government under 

 Specifications, with Analyses of Coal delivered for the Fiscal 

 Year 1908-9 ; by George S. Pope. Pp. 80, 8 tables. 



No. 430. Advance Chapters from Contributions to Economic 

 Geology — A. Gold and Silver ; by J. M. Hill, F. L. HIkss, 

 D. F. MacDonald and J. T. Pardee — B. Part I. Copper ; 

 by L. C. Graton, H. S. Gale, and G. W. Stose. Pp. 06, 5 

 figures — C. Lead and zinc; by L. J. Pepperberg — E. L-on 

 and manganese ; by E. C. Harder, J. L. Rich, A. C. Spencer, 

 and Sidney Paige. Pp. 56, 1 plate, 4 figures — G. Mineral 

 Paints ; by J. C. Stoddard, A. C. Callen, F. T. Agthe and J. 

 L. Dynan — I. Salines ; by C. L. Bregbr and A. R. Schultz. 



Water Supply Papers. — No. 236. The Quality of Surface 

 Waters in the United States. Part L — Analyses of Waters 

 east of the one hundredth meridian ; by R. B. Dole. Pp. 123. 



Nos. 241-249. Surface Water Supply of the United States, 

 1907-8. Prepared under the direction of M. O. Leighton. No. 

 241. Part L North Atlantic Coast ; by H. K. Barroavs and R. 

 H. Bolster. Pp. 356, 6 plates. No. 243. Part IIL Ohio River 

 Basin ; by A. H. Horton, M. R. Hall, and R. H. Bolster. Pp. 

 224, 4 plates, 1 figure. No. 244. Part IV. St. Lawrence River 

 Basin ; by H. K. Barrows, A. H. Horton, and R. H. Bolster. 

 Pp. 163, 7 plates, 1 figure. No. 245. Part V. Upper Missis- 

 sippi River and Hudson Bay Basins; by A. H. Hortox, E. F. 

 Chandler, and R. H. Bolster. Pp. 133, 5 plates, 1 figure. 

 No. 247. Part VH. Lower Mississippi Basin; by W. B. Freeman, 

 W. A. Lamb and R. H. Bolster. No. 248. Part VIH. Western 

 Gulf of Mexico ; by W. B. Freeman, W. A. Lamb, and R. H. 

 Bolster. Pp. 171, 4 plates, 1 figure. No. 249. Part IX. 

 Colorado River Basin ; by W. B. P'keeman and R. H. Bolster. 

 Pp. 206, 1 plates. 



2. Illinois Geological Survey. Bulletin No. 13, The Missis- 

 sippi Valley between Savanna and Davenport; by J. Ernest 

 Carman. Pp. xi, 85 ; 23 plates, 26 figures and map. Univer- 

 sity of Illinois, Urbana, 1909. — This is another of the excellent 

 educational bulletins issued by the Illinois Survey. While the 

 object of the bulletin is to give a detailed account of the strati- 

 graphy, physiography and glacial geology of this part of the 

 Mississippi Valley, it should attract readers beyond tbe state 

 because of the clear way in which the accepted views regarding 

 glaciation, and particularly eolian sand and loess, are discussed. 



