146 MAINE AGRICULTURAL EXPERIMENT STATION. I909. 



way. This can be done by comparing the father's average pen 

 fertiHty and average pen hatching quahty of eggs as given in 

 Table VII with the average fertihty and hatching quahty of 

 eggs exhibited by his daughters. Such a comparison is made 

 in Table XXIII and in Figures i and 2. The arrangement of 

 the data in this table and the figures is fully explained in the 

 legends. 



b5 35 N 

 C oc A e re / s 



57 70 



Fig. 15. Diagram showing the relation btween the fathers' 

 average pen records of hatching quality, and the average hatch- 

 ing quality of their daughters' eggs. The solid line gives the 

 average per cent, of fertile eggs hatched from the females mated 

 with each male. The dotted line gives the average per cent, of 

 fertile eggs hatched for the family of daughters corresponding 

 to each father. 



From the table and the diagrams we note the following 

 ])oints ; it must be understood that, on account of the meager- 

 ne.ss of the data, these results are simply suggestions to be 

 tested by further work, rather than definite conclusions : 



I. There clearly is no significant relationship, so far as the 

 present data show, between the father's average pen percentage 

 of eggs infertile and the daughters' average for the same char- 

 acter. The zigzag daughter line in Fig. 14 shows no tendency 

 to parallel the line for the fathers. 



