60 THE CALL OF THE HEN. 
nest to aid me any farther than to tell me the number of eggs a hen laid, 
what particular eggs she laid, and the progeny of each hen, both male 
and female. I also found great variations in type in mature cockerels 
from each individual hen, which we considered was due to the difference 
in type of the male bird and the difference in vitality of one or both 
birds at different times during the breeding season; sometimes the hen 
Fic. 35—Three degrees of amativeness (otherwise called ‘‘prepotency”), 
