Brody's chick (daily increment curves) 



4 5 6 7 8 9 ion 1213141516171819 20 3 4 5 6 7 8 9 10111213141516171S 

 t t t t 



Lamson 8c Edmonds data Hasselbalch 



(«) {b) 



Le Breton &. Schaeffer's chick 

 (daily increment curve) 



^ 



7- 

 6- 

 5- 

 4- 

 3- 

 2- 

 i - 



4 5 6 7 8 9 10 1112 13141516 17 18 1920 



W.Legh. | | 



(c) 



Schmalhausen's chick (daily increment curves) 

 7- 



N 



i^ 



^ 



5 6 7 8 9 10111213141516171819 4 5 6 7 8 9 10111213141516171819 



1926 Max.t t 1927 t t t 



(d) (e) 



Fig. 48. 



27-2 



