206 



nnli, W. IT.. 37, 4(1, 47, 40. 52, 

 rinna, ,T. D.. .'{.5. 45. 

 Dartou. N. II.. 3(5, 37. 47. 4.S, 

 Da.y, D. T.. 40. 

 Desoi-, E., 44. 



Di.itomaceous earth, discussed, 120. 

 Drainage, 59. 

 Drum Cliff, 74. 7."., 76. 

 section at, 70, 03, 

 Ducatel, J. T., 29, 41, 42. 

 Dug wells, discussed, 122. 

 Duration of crop season, 172. 

 Duration of warm waves, 169. 

 Duration of cold periods, 170. 



Eastman. C. R., 52. 

 Economic resources, discussed, 113. 

 Eilicott. James F., 14S, 176. 

 Eocene water-horizon, 123. 

 Extremes of temperature at Charlotte 

 Hall, 165. 



Ila.v. O. P., 53. 

 Hayden, H. H., 32, 39. 

 Heilprin, Angelo, 35, 36, 45, 46. 

 Herrmau, Augustin, 28. 

 Herrman map, 2,S. 

 Herrmann, C. F. von. 17. 147. 

 Higgins, James, 44, 4.1. 

 Historical review. 25. 

 Hollick, Arthur, 52, 53. 

 Hoxton map, 29. 

 H.vatt, Alpheus. 170. 

 H.vdrography, discu-iised. 177. 



1 



Illustrations. List of. 15. 

 Infusorial earth. 120. 

 Interpretation of (.Jcologic record, 98. 

 Introduction, 21. 



Johns 

 Jones 



Fairhaven diatomaceous earth. 71. 

 Farrer map, 27. 

 Fence timber, 197, 

 Finch, John, 32, 34, 40, 

 Fisher, R. S., 44. 

 Forests, discussed, 183. 

 Forest fires, 197. 

 Forest types, 187. 

 Forest trees, 185. 



Fossils from southern Maryland. 3.S. 34. 

 Fossils of the Choptank formation. 75, 

 76, 79. 



of the Lafayette formation, SI. 



of the St. Mary's formation, 78, 

 79, SO. 



of the Talbot formation, 103. 105. 

 Future improvement of Forest lands, 

 200. 



<Ieographic research in St. Mary's 



county, 20. 

 Geologic research in St. Mary's county. 



31. 



Geology, discussed, 07. 

 Gibbes, R. W., 43. 

 Glenn, L. C, 52. 

 Gravels, discussed, 118. 

 Griffllh, Dennis, 29. 

 Grovcr, ^'. C, IS, 177. 



H 



Lafa.vette formation, SI. 



age of. SI. 



areal distribution of, 82. 



character of materials of, 83. 



origin of materials of, 83. 



sedimentary record of, 98. 



strati.graphic relations of. 83. 



structure and thiclcness of, 82. 

 Lafa.vette stage, 61. 

 Langleys Bluff, section at, 90. 

 Lea, Isaac, 34, 40. 

 Leonardtown, artesian wi'lls at. 124. 



magnetic station at. 179. 



mean temperatures at. 154. 



precipitation at. 159. 



section near, 90. 

 Leonardtown Loam, 127. 



mechanical analyses of, 120. 

 Lindenliohl, A., 47. 

 Loblolly pine, 190. 

 Local sections of Miocene age, 79. 



of Sunderland a.ge, 00. 



of Talbot age. 95. 



of Wicomico age. 03. 

 Lord Baltimore map. 27. 

 Lucas. F. A.. 53. 

 Lyell. Sir Charles. 35. 43. 



M 



JIacIure. William. 25. 32, JiO. 

 Maddox, artesian well near, 123. 

 Magnetic declination, discussed. 179. 

 Markoe, Francis, Jr., 43. 

 Marls, discussed, 119, 



