172 Agricultural Experiment Station^ Ithaca, N. Y. 



Tables Y and Yl give the growth of lambs from thoroughbred 

 males and grade merino ewes. 



It will be noticed that the grade Dorsets made a much better 

 growth than the Shropshires. 



In selecting ewes for these two flocks care was taken to have the 

 flocks as near alike as to age, breeding and general appearance as it 

 was possible to make them. Whenever the ewes selected for these 

 two flocks were those that were retained from the previous years' 

 pni'chase, their previous record was taken into account. 



