138 abstracts: references 



REFERENCES 



AGRICULTURE. — Soil Surveys (Advance Sheets— Field operations of the Bureau 



of Soils, 1909) as follows: 



Gaston County, N. C. W. E. Hearn, L. L. Brinkley and F. P. Drane. Pp. 



33. Map. 



Washington County, N. Y. M. E. Carr, G. A. Crabb, V. J. Frost and D. W. 



Hallock. Pp. 52. 2 Maps. 



Campbell County, Va. R. A. Winston. Pp. 39. Map. 



Waushara Courtly, Wis. J. W. Nelson, G. Conrey, A. K. Kuhlman. Pp. 



33. Map. 



Coffee County, Ala. L. A. Hurst and A. D. Cameron. Pp. 51. Map. 



Scotland Co., N. C. R. B. Hardison, J. W. Nelson, and D. D. Long, Pp. 



32. Map. 



Western South Dakota. (Reconnaissance.) G. N. Coffee. Pp. 80. Map. 



Woodland Area, Cal. C. W. Mann, J. F. Warner, H. L. Westover. and J. 



E. Ferguson. Pp. 57. 2 Maps. 



Clay County, Miss. E. L. Worthen. Pp. 41. Map. 



Rice County, Minn. R. T. A. Burke and L. A. Kolbe. Pp. 39. Map. 



Cedar County, Mo. E. B. Watson and H. F. Williams. Pp. 34. Map. 



Southwestern Pennsylvania. (Reconnaissance.) H. J. Wilder and C. F. 



Shaw. Pp. 69. Map. 



Berks County, Pa. W. J. Geib, E. L. Worthen, F. S. Welsh, J. C. Britton 



and C. R. Zappone, Jr. Pp. 47. Map. 

 HYDROLOGY. — Surface water supply of the United States, 1909: Part VII. Lower 



Mississippi Basin. W. B. Freeman and R. H. Bolster. Water-Supply 



Paper, U. S. Geological Survey No. 267. Pp. 99, with views. 1911. 



Surface water supply of the United States, 1909: Part VIII. Western Gulf 



of Mexico. W. B. Freeman and R. H. Bolster. Water-Supply Paper, U. S. 



Geological Survey No. 268. Pp. 107, with views. 1911. 



Quality of the water supplies of Kansas. H. N. Parker. With a preliminary 



report on Stream pollution by mine waters in southeastern Kansas. E. H. S. 



Bailey. Water Supply Paper, U. S. Geological Survey No. 273. Pp. 375, 



with maps. 1911. 

 STATISTICS. — Mineral resources of the United States, calendar year 1909. Part 



I — Metals. Part II — Nonmetals. U. S. Geological Survey. 1911. 



