Studies in Milk Secretion 



121 



The leading imported bulls are, omitting those with less 

 than two daughter-dam pairs : 



Interested Prince 

 Raleigh's Fairy Boy 

 Gamboge's Knight 

 Royal Majesty 

 Noble of Oaklands 

 Eminent's Raleigh 

 The Imported Jap 

 Gedney Farm Oxford Lad 



(102) —0.012 Not significant 



(212) 



—0.714 



Significant 



(71) 



+0.148 



Not significant 



(ISO) 



—0.264 



Not significant 



(26) 



+0.386 



Not significant 



(224) 



—1.165 



Probably not significant 



(43) 



+0.269 



Probably not significant 



(109) 



—0.071 



Not significant 



In the list of native bulls the one transmitting the highest 

 butter-fat percentage to his progeny was Irene's King Pogis 

 with 0.650 as his daughter-dam difference. The lowest bull 

 was Loretta's King reducing the butter-fat test of his progeny- 

 over that of their dams 0.430 per cent. The bull transmitting 

 the highest butter-fat percentage to his offspring for the im- 

 ported sires was Noble of Oaklands with 0.386 to his credit. 

 The bull which decreased his daughter's butter-fat percentage 

 most was Eminent's Raleigh with a decrease of 1.165 per cent. 



In the native bull group six bulls increased the butter-fat 

 percentage of their daughters. Of this number two sires sig- 

 nificantly increased the butter-fat percentage of their daughters, 

 one increased it but probably not significantly and three in- 

 creased it but the increase was not significant. Of those sires 

 who decreased the butter-fat percentage of their daughters one 

 significantly and another probably significantly decreased it. In 

 the imported bull group three- increased and five decreased the 

 butter-fat percentage. Of those sires which increased the but- 

 ter-fat percentage not one increased it by an amount of more 

 than doubtful significance. Three sires not signicantly, one 

 sire probably not significantly and one sire significantly lowered 

 the butter- fat percentage. The native bulls were clearly supe- 

 rior to the imported bulls in their abilities to transmit high but- 

 ter-fat percentage. 



The outstanding bull of these two lists as far as concerns 

 the number of daughter-dam pairs and the amount he raised 

 the butter-fat percentage of his daughters is Irene's King Pogis. 

 The pedigree of this bull is shown below. 



