ADAPTATION TO ENVIEOXMENT WARDLAW 411 



the organism to obtain the advantages of a freer interchange with 

 its surroundings without endangering the stability of its essential 

 living matter. 



The evolutionary development of the adaptive mechanisms of the 

 organism has continually extended the range and scope of its con- 

 trol over its environment. Examples of the most highly specialized 

 forms of this control are the maintenance of a constant body tem- 

 f)erature b}^ homoiothermal animals, and the provision of a special 

 food supply for their young by mammals. 



As the effectiveness of the mechanisms for the adaptation of the 

 environment to its needs has increased, the need for further adaptive 

 modification of the organism itself has correspondingly diminished. 



REFERENCES 



Bakee, R. T., and Smith, H. G. 



1920. A researcli on the Eucalyptus, esiiecially in regurd to their essential 

 oils. 2d edition, Sydney. 

 Baly, E. C. C, et al. 



1927, 1928. Proc. Roy. Sue. London, vol. 116A, pp. 197, 212, 219, 1927: 

 vol. 116A, p. 393, 3928. 



BOTAZZI, F. 



1908. Ergeb. d. Physiol., vol. 7, p. 161. 

 Cambage, R. H. 



1928. Journ. Proc. Roy. Soc. New South Wales, vol. G2, p. 152. 

 Dakin, W. J. 



1908. Biochem. Journ., vol. 3, p. 473. 

 David, T. W. E. 



1928. Trans. Proc. Roy. Soc. South Australia, vol. 52, p. 191. 

 Hamburgheb, H. J. 



1923. Johns Hopkins Hosp. Bull. .34. pp. 226, 266. 

 Macaxlum, a. B. 



1926. Physiol. Rev., vol. 6, p. 316. 

 MooEE, B., and Webstek, T. A. 



1914. Proc. Roy. Soc. London, vol. 87B, p. 163. 

 Ringer, S. 



1880-1886. Journ. Physiol., vol. 3, p. 380, 1880-82; vol. 5, p. 98, 1884^85; 

 vol. 7, p. 118, 1886. 

 Wakdlaw, H. S. H. 



1915. Journ. Proc. Roy. Soc. New South Wales, vol. 49, p. 169. 

 1915. Proc. Linn. Soc. New South Wales, vol. 40, p. 231. 



1917. Proc. Linn. Soc. New South Wales, vol. 42, p. 815. 



1918. Proc. Linn. Soc. New South Wales, vol. 43, p. 844. 

 1926. Australian Journ. Exp. Biol. Med. Sci., vol. 3, p. 130. 



