178 FOREST DISTRIBUTION 



the Rocky Mountains. Bull. U. S. Dept. Agrie. 154: 1-35. Ja 

 1915. 



40. ^MathewS; 0. E. Water penetration in the gumbo soils, 

 of the Belle Fourche Reclamation Project. Bull. U. S. Dept. 

 Agrie. 447 : 1-12. N 1916. 



41. ]M.vxiMiLiAX. Alex^vnder Philipp. Reise in das innere 

 Nord Amerika in dem Jahren 1932-34. Coblenz, 1841. 



42. ilEEHAN, Thomas. The plants of Lewis and Clark's 

 expedition across the continent, 1804-1806. Proc. Acad. Nat. 

 Sci. Phila. Ja 1898. 



43. ilEERiAM, C. Hart. Life zones and crop zones of the 

 United States. Bull. Div. Biol. Surv. U. S. Dept. Agrie. 10: 

 1-79. pi. 1. 189S. 



44. Newberry. J. S. The later extinct floras of North 

 America. Monog. U. S. Geol. Surv. 35 : 1-295. pi. 1-68. 189S. 



45. Oregon Historicai. Society. The correspondence and 

 journals of Captain Nathaniel J. Wyeth, 1831-36. Sources of the 

 History of Oregon. 1 : — . Eugene. 1899. 



46. Piper, Charles \. Flora of the State of Washington. 

 Cont. U. S. Nat. Herb. 11 : 1-637. pi. 1-lS. 1906. 



47. PuRSH, Frederick. Flora Americae Septentrionalis. 

 London. l':^14. 



48. Rajialey. Francis. Remarks on the distribution of 

 the plants in Colorado east of the Divide. Pi^stelsia. 1902 : — . 



49. Report National Conservation Commission. Papers on 

 the conservation of water resources. Water Sup. Paper U. S. 

 Geol. Surv. 234 : 1-96. pi. 1-2. 1909. 



50. RoBBiNs, ^r. W. Climatology and vegetation in Col- 

 orado. Bot. Gaz. 49 : 256-280. Apr 1910. 



51. Ross, D. W.. Whistler, J. T. and Noble, T. A. Report 

 on progress of stream measurements for the calendar year 1905. 

 Columbia River and Puget Sound Drainage. Water Supply and 

 Irrigation Paper U. S. Geol. Surv. 17S : 1-250. pi. l. 1906. 



52. RowE, J. P. and Wilson. R. A. Geology and economic 

 deposits of a portion of eastern Montana. Univ. ^lont. Studies^ 

 I. 1:1-58. f.1-27. Missoula. 1916. 



53. Rydberg, p. a. Vegetative life zones of the Rocky 

 Mountains. :\Iem. N. Y. Bot. Card. 6 : 447-499. Au 1916. 



