140 A MANUAL OF MENDELISM 



having large effects with regard to the quaUty of milk, 

 and probably a number of factors having smaller effects, 

 and that the two main factors produced intermediates. 

 In the light of the newer evidence just discussed, it is 

 very doubtful whether this earlier opinion should 

 stand. The earlier evidence was as follows : Count 

 Ahlefeldt, of Tranekjaer, in the Danish island of Lange- 

 land, had a number of Red Danish cows crossed with 

 a Jersey sire and their daughters crossed again with 

 another Jersey sire. The qualities of milk yielded by 

 the Red Danish cows and their half-bred daughters and 

 three-quarter-bred granddaughters were as follows : 



Average : 3-33 4-08 4-80 



It was assumed that both the Jersey sires were 

 5 per cent, bulls, which is somewhere near the average 



