^^' IV] ACCLBIATISATION 31 



Summary 

 Acclimatisation in the hands of man, who is impatient of 

 results, has been largely a matter of trial and error, with nume- 

 rous failures, but there is reason to suppose that this is not so 

 much the case in the hands of nature, working as she does over 

 vast periods of time, with very small steps. Species have thus 

 been acclimatised to conditions wonderfully different from those 

 in which they began. 



