112 Maine Agricultural Experiment Station. 1919. 



The pedigree shows Hood Farm Torono an inbred Tor- 

 mentor bull, Tormentor occurring on both sides of the pedi- 

 gree. On the whole he is not very near to island stock, the 

 first appearance of it coming in the third generation. 



Spermfield's Owl is a fairly close second to Hood Farm 

 Torono when the milk production and numbers of his off- 

 spring, etc. are considered. Hector Marigold is the poorest of 

 these sires as his progeny are 3507.0 pounds of milk below the 

 production of their dams. This is, however, based on only two 

 daughter-dam pairs (See table 3 for the probable errors). Out 

 of these leading bulls five increased and three decreased the 

 production of their progeny. Within this number the milk pro- 

 duction of the daughters of two sires was significantly raised. 

 The milk production of the daughters of another plus sire was 

 probably significantly raised. In the not significantly raised 

 group there were two sires. Of the sires which lowered the 

 milk yield one significantly lowered it and two lowered it by an 

 amount which was probably not significant. 



In the group of leading imported sires Royal Majesty 

 proved the best with 2138.6 pounds of milk for his daughters' 

 production over the production of their dams. Second to this 

 bull is Eminent's Raleigh with 1325.0 pounds of milk that each 

 of his daughters averaged more than the production of their 

 dams. The poorest of these bulls is The Imported Jap as he 

 lowered the average milk production of his daughters 15334 

 pounds. Considering the probable significance of the daughter- 

 dam difference for each sire, it is found that within the plus 

 group there was one difference, probably significant; and four 

 differences, not significant. In the minus two differences were 

 not significant and one was probably significant. 



These facts reveal a slight superiority of the native sires 

 as compared with the imported sires. 



Of considerable importance in judging these bulls' merits 

 in transmitting milk production to their offspring is the relative 

 position occupied by the dam's milk production as compared 

 with her daughters. This is shown for the above bulls in the 

 last column of table 4. The two leading native bulls Hood 

 Farm Torono and Spermfield's Owl may be compared. Hood 

 Farm Torono was bred to 29 per cent of class A cows. From 

 these he produced 26 per cent class A daughters and 3 per cent 



