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HARRIS, KIRKPATRICK, BLAKESLEE, WARNER AND CARD 



tration of the bulk of the birds into a few of the classes, with the result 

 that a rather large number of classes contain only a few birds each. A 

 closer study of the fit of the regression line may, therefore, be deferrec 

 until more data are in hand. 



The results of the tests of accuracy of prediction in the 415 White Leg 

 horn birds of the 1917-1918 contest are given in tables 2 to 4. Since late 



TABLE 2 



Average deviation with regard to sign of predicted annual egg record from actual record. Predictio 

 of annual production from one- and from two-months performance. Equations based on Siort 

 experience, 1911 to 1917. Test of equations on 415 White Leghorns, Starrs, 1917-1918. 



we shall have to compare the results for prediction from one month 

 performance with that from two- and from three-months record it has be&amp;lt; 

 desirable to give the results side by side in the same table. The read 

 need not, therefore, concern himself with the values for prediction fro 

 two-months production until later. Since the errors of prediction of t 1 

 annual record from each individual month must be compared with t. 

 results for prediction from the combined production of two months, t. 

 constants for the single months have been given in duplicate. 





