128 



Maine Agricultural Experiment Station. 1919. 



list of these bulls together with the number of the bull in the 

 series of bulls in table 6 and the net change of butter-fat by 

 which their daughters were in excess or defect of their dams 

 is given below. 



List of leading native sires, omitting those who have not 

 two daughter-dam pairs, are : 



Hood Farm Pogis 9th 



(48) 



+ 49.49 



Significant 



Hood Farm Torono 



(16) 



+121.51 



Significant 



Spermfield Owl 



(21) 



+ 97.71 



Significant 



Loretta's King 



(80) 



+ 15.94 



Not significant 



Sayda*s Heir 3d 



(75) 



+ 20.87 



Not significant 



Hector Marigold 



(216) 



—144.12 



Significant 



Irene's King Pogis 



(83) 



+ 12.31 



Not significant 



Lady Letty's Victor 



(116) 



— 15.70 



Not significant 



Leading imported sires, omitting those which have not 

 two daughter-dam pairs, are : 



Interested Prince 

 Raleigh's Fairy Boy 

 Gamboge's Knight 

 Royal Majesty 

 Noble of Oaklands 

 Eminent's Raleigh 

 The Imported Jap 

 Gedney Farm Oxford Lad 



(73) 



+ 21.07 



Not significant 



(169) 



— 53.67 



Not significant 



(121) 



— 20.07 



Not significant 



(30) 



+ 81.34 



Probably significant 



(92) 



+ 4.24 



Not significant 



(142) 



— 37.30 



Not significant 



(174) 



— 61.91 



Probably not significant 



(97) 



+ 1.57 



Not significant 



In the list of native sires six increase the production of 

 their daughters and two decrease it. Within this group of six 

 sires which increased the butter-fat, three did so by an amount 

 which was significant and three by an amount which was not 

 significant. One sire which decreased the butter-fat yield of 

 his daughters did it by an amount which was not significant. 

 The other sire, Hector's Marigold, decreased the yield of his 

 daughters significantly. In the list of imported sires four in- 

 crease and four decrease the production of butter-fat of their 

 daughters over that of their dams. Of the four imported sires 

 which increase the butter-fat yield only one, Royal Majesty in- 

 creased it by an amount great enough to be probably significant. 

 Within the group of sires which decreased the butter-fat of 

 their daughters none decreased it significantly. This particular 

 group of native sires is consequently superior to the imported 



