98 GROWTH 



Eckles, 15 while at the University of Missouri, made some study 

 of the question. A number of heifers were used in a study of 

 the normal growth rate of dairy animals. Two breeds, Jersey 

 and Holstein, were used, and each was divided into three 

 groups. One group was considerably below the normal birth 

 weight, another was of average, and the third was markedly 

 above the average birth weight. The groups, both above and 

 below the average, were taller at two years than was the average 

 group. There was a slight tendency, however, for the calves 

 largest at birth to be the taller at twenty-four months. 



A few cases are also presented from data available but not 

 used in his study of normal growth. Here the tendency of those 

 heavier at birth to be above the average in height at two years 

 is more marked, but even in these examples the Jerseys that 

 were underweight at birth were of average height at two years. 



Table IV 



RELATION OF BIRTH WEIGHT TO MATURE HEIGHT 

 AT WITHERS 



Holstein Jersey 



Eckles concludes that there is little evidence of any relation 

 between birth weight and mature size, especially in view of the 

 large individual variations. 



V. Underfeeding and Growth 



Up to this point we have been chiefly concerned with what 

 we may call qualitative factors, such as the amount and kind of 

 protein, and of minerals; with the specific role of carbohydrates 



