To Scientific Intelligence. 



Watbb Supply Papers. — No. 257. Well-Drilling Methods ; 

 by Isaiah Bowman. Pp. 139 ; 4 plates, 25 figures. 



' No. 258. Underground- Water Papers 1910 ; by M. L. Fuller, 

 F. (\. Clapp, G. C. Matsox, Samuel Sanford, and II. C. Wolff. 

 Pp. 123 ; 2 plates, 32 figures. 



No. 270, Surface Water Supply of the United States, 1909. 

 Part X. The Great Basin ; prepared under the Direction of JVI. 

 O. Leighton by E. C. La Rub and P. F. IIensiiaw. Pp. 192; 

 5 plates, 1 figure. 



2. Topographic and Geologic Survey of Pennsylvania. 

 Richard R. Hice, State Geologist. Report iVo. 1. Geology of 

 the Oil and Gas Fields in SewicJdey Quadrangle ; by M. J. 

 Munn. Surveyed in cooperation with the U. S. Geological "Sur- 

 vey. Pp. 171 ; 10 plates. Harrisburg, 1910. Report No. 3. 

 Geology of the Oil and Gas Fields of the Clarion Quad- 

 rangle ; by M. J. Munn. Pp. Ill ; 9 plates, one figure. — 

 These recently issued reports show the important work which 

 is being carried forward by the Geological Survey of Penn- 

 sylvania in cooperation with the U. S. Survey. They have been 

 prepared by the same author (who is also the author of the Sewiek- 

 ley Folio noted above), and give detailed and accurate information 

 in regard to the gas and oil fields in the two quadrangles men-_ 

 tioned. The facts here presented will be of great value, not only 

 locally but also to all oil and gas operators as well as to those 

 concerned with the geological problems involved. The careful 

 sections given in the series of deep wells exhibit the geologic rela- 

 tions. Perhaps the most interesting points discussed are those 

 bearing upon the relation between the quantity of oil and gas 

 and the geological structure shown in the anticlinal folds. The 

 writer does not attempt to settle the difficult and frequently dis- 

 cussed questions involved, but the full and accurate statement of 

 facts, particularly those of the better known Sewickley quad- 

 rangle, will do much to throw light upon the subject. 



3. North Carolina Geological and Economic Survey. Joseph 

 H. Pkatt, State Geologist. — The following publications have 

 recently appeared : 



Biennial Report of the State Geologist, 1909-1910. Pp. 152. 



Bulletin No. 22. The Cid Mining District of Davidson County, 

 North Carolina ; by Joseph E. Pogue, Jr. Pp. 144; 22 plates, 

 5 figures. 



Economic Paper No. 21. Proceedings of the third Drainage 

 Convention held at Wilmington, N. C, Nov. 22, 23, 1910; and 

 North Carolina Drainage Law codified ; compiled by Joseph 

 H. Pratt. Pp. 61 ; 4 plates. 



4. The Ice Age in North America and its Bearings upon the 

 Antiquity of Man; by G. Frederick Wright. 8°, pp. 763; 

 166 figures. Oberlin, Ohio, 1911 (Bibliotheca Sacra Co.).— A fifth 

 edition of this well-known work is proof both of the widespread 

 interest in glacial phenomena and the geological period in which 

 its results were so strikingly displayed, and also of Professor 

 Wright's success in creating a work to satisfy it. 



