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GROWTH 



We shall next consider data published by C. H. Eckles, 15 

 from studies made at the Missouri University. One heifer was 

 given a liberal ration, and grew at the normal rate. Another 

 was given a limited ration, and her growth was greatly retarded. 

 You will note that this animal ultimately reached mature size, 

 by lengthening the growing period. The fact seems conclusively 

 established, that if the rate of growth is retarded, the growing 

 period will be lengthened. 



Figure 56. Compensation for slow growth by lengthen- 

 ing the growing period. After Eckles and Swett. 



Probably the most extensive and important contributions on 

 this topic have been made by Osborne and Mendel. 53 



Growth was inhibited, not only by quantitative underfeeding 

 in some cases, but also in others by a ration inadequate for 

 growth. Some contained too small a quantity of protein, some 

 contained inadequate proteins, and others were probably defi- 

 cient in vitamin B. In some of the cases they report, the period 

 of undernutrition was both prolonged and severe, but still the 

 experimental animals when placed on satisfactory rations finally 



