84 INFLUENCE OF THE HOUSE ON SECOND GENERATION 



SUMMARY 



The following conclusions are a summary of the data obtained from the 

 work with the first generation. The experiment is in progress at the 

 present time, and will be continued for several generations. Future results 

 will be published from time to time as the work is completed. 



(1) The cost of tight double-walled construction is greater than 

 that of any other type. In the experiment here discussed it was found 

 that the fertility and hatching quality of eggs were very much better in 

 fresh-air houses of less expensive construction. 



(2) The fertility and hatching quality of eggs is much better in the 

 open and cloth-front houses, where the fowls are allowed free access to 

 yards or range. 



(3) The progeny of fowls in fresh-air houses, having free access to 

 yards or range, are more vigorous than those of the fowls which are main- 

 tained in houses of other construction, and which do not have the liberty 

 of the yards during the breeding season. 



