Studies in Milk Secretion 157 



The animals appearing in table 13 which have more than 

 four appearances on the sire's side or more than three appear- 

 ances on the dam's side of the pedigree may be arranged in the 

 same manner as for table 12. The names of the animals in 

 italics also appear in the list of superior sires. Golden Lad 1242 

 (22-11), Boyle (15-6), Imp. Golden Fern's Lad 2160 (15-4), 

 Tormentor 259 (14-4), Golden Lass 4th 2447 (8-4), Sultanne's 

 Favorite 873 (9-4), Golden Fern 471 1 (8-3), Tootsie 3214 

 (7-3), Bachelor of St. L. 4558 (5-5), Diploma 16219 (5-5), 

 Sophie's Tormentor 20883 (5 _ 4)> Eminence 7124 (7-1), Emi- 

 nent 2d 2532 (7-1), Ida's Rioter of St. L. 13656 (6-2), Baron's 

 Sophie 17615 (5-3), Stoke Pogis 5th 5987 (6-0), Sultana's 

 Rosette 2881 (5-1), Count Wolseley 928 (5-1), Combination 

 4389 (5-1), Ida Marigold 32615 (5-0), Stoke Pogis of Pros- 

 pect 29121 (5-0), Hood Farm Pogis 40684 (5-0), Ida's Stoke 

 Pogis 13658 (5-0), Arawana Marigold 9380 (5-0), Oonan 1485 

 (5-0), Eurotas 2454 (0-4), Lord Dartmouth 6302 (0-4), con- 

 stitute the animals which appear in the pedigree of the sires 

 whose progeny performance is poor. 



The names in italics in the above group of animals make 

 it clear that most of the sires whose progeny test shows them 

 superior have ancestors in common with the sires whose pro- 

 geny test show them inferior. This is especially true for the 

 sires which appear a large number of times for either group. 

 Examination of table 12 in conjunction with table 13 shows 

 that no sires who increased the production of his daughters has 

 ancestors which repeat four times on the male side or three 

 times on the female side which do not also appear in the pedi- 

 grees of the inferior sires decreasing the production of both 

 these items. A similar examination of this list of bulls ex- 

 tracted from table 13 shows that the only bull which does not 

 appear at all in the pedigrees of the bulls which increased their 

 daughters' production is Lord Dartmouth 6302 (0-4). 



When cognizance is taken of the fact that the appearances 

 of a bull in table 12 should be multiplied by 1.7 to make them 

 comparable with table 13 as there are only 28 pedigrees in this 

 table to 47 in table 13 it at once becomes clear that in the num- 

 ber of appearances of these bulls even though all the bulls 

 which appear four times on the male side or 3 times on the 

 female side in the first table also appear in the second pedi- 



