114 



FLETCHER, COWAN AND ARLITT 

 TABLE 3 — Continued 



19 

 14 

 10 



15 

 15 



10 

 9 

 3 



7 1/3 



7 

 12 



9 1/2 



Day 13 

 Reaction 



No. of Chick 12 3 



2 1 



4 1 5 



14 3 7 



Average 11/3 4 1/3 14 1/3 



20 2 3 



Average 2 3 



41 1 9 



47 4 7 



48 9 8 



Average 4 2/3 8 



80 13 



81 1 7 



Average 1/2 10 



Day 14 

 Reaction 



No. of Chick 12 3 



3 



6 1 



10 



Average 1/3 



21 



23 1 



25 



Average 1/3 



43 



46 1 



48 



51 2 



Average 1 



71 1 8 11 



72 1 19 



74 1 19 



Average 1/3 3 1/3 16 1/3 



Day 16 

 Reaction 

 1 2 



