5 TURN WHITE 6i 



other hand, the summer 

 atively short season, and 

 t does not become much 

 ;ather. Consequently no 

 le long winter hairs grow 

 iingly become a common 

 :re is a change of colour 

 roduced by a lengthening 



mimals like the roebuck 



existence of an autumn 



n a difference in colour, 



the fur is demonstrated 



y species, as, for instance, 



I hairs themselves, as seen 



iably in calibre at the two 



n that species, for example, 



of a much finer character 



t dress of summer, which 



ck. Moreover, in spite of 



in blanching on account 



ices of turning white in a 



evidence to show that even 



in human hair the change from dark to white as age 



advances is brought about by the replacement of dark 



hairs by white ones, and not by the bleaching of the 



former. In this case, however, the change, instead of 



being seasonal and sudden, is gradual and due to age. 



If the change was due to blanching, we should, of course, 



find some hairs which were partially white and partially 



brown (or black, as the case may be). And here it 



may be remarked that if such partially blanched hairs 



were met with, we should naturally expect to find that 



