64 Pastwe Problems 



15. Stapledon, R. G., "The Relation of Indigenous to Sown Species on Grassland." 



Abstracts of Papers, Ann. Meeting Agr. Ed. Ass. Sept. 1915. 



16. . "Pastiure Problems: Drought Resistance." This Journal, Vol. v. 



Part 2, March, 1913. 



17. . "Pasture Problems : The Response of Individual Species under Manures." 



Ibid. Vol. VI. Part 4, Nov. 1914. 



18. . "On the Plant Communities of Farm Land." Ann. Bot. Vol. xxx. 



p. 161. 



19. Tansley, a. G., Types of British Vegetation. Camb. Univ. Press, 1911. 



20. Thompson, H. S., " On Laying down Land to Grass and its Subsequent Manage- 



ment." Journ. Roy. Agr. Sac. Eng. Vol. xix. 



{Received February 24:th, 1916.) 



