134 A MANUAL OF MENDELISM 



dicular for the daughters. Thus the diagonal line of 

 squares gives the dams' grades, the figures those of their 

 daughters. If the indications of the previous diagrams 

 be accepted, it would seem that Lombjerge carried 

 factors which allowed his daughters to give milk down 

 to about the 3'2 grade. The diagram indicates also 

 that his daughters were better as their dams were better. 



30 -1 -2 -3 -4 5 -6 -7 -8 -9 40 



In Mr. Christensen's volume on the Taurus line of 

 sires, Taurus IV, the head of the line, is credited with 

 47 daughters ; and, while the average quality of their 

 dams' milk was 3"58, that of the daughters was 3"88. 

 In 32 cases the daughters were better than the dams ; 

 and, while several of the dams gave 3*3 per cent, milk 

 and under, only one daughter fell to this point. Indeed, 

 if the indications of the previous diagrams are to be 



