, CHAPTER XVII 



Influence of the Grandparents on the Granddaughters' 



Milk Yield 



The influence of the grandparents on the milk yields or butter- 

 fat percentages of the granddaughters may be tested in the same 

 manner as in exercise XVI. Table 138 of M. S. would be a good one 

 for the student to calculate and from which to plot the average milk 

 production of the granddaughters for the granddam of a given 

 grade of milk yield. The conclusions derived from the plot should 

 be considered in conjunction with a study of the results given in 

 Chapters XX, XXI, XXII, and XXIII of M. S. Cross-section 

 paper for this exercise is found on page 102. 



101 



