MILK PRODUCTION 



499 



ments would suffice to support the storage of 336 Cals. of 

 energy in four per cent milk. The method of computation is 

 shown in the following table. 



TABLE 137. ENERGY RECOVERED IN FOUR PER CENT MILK AND IN 



FATTENING 



594. Kellner's results. Confirmation of this hypothesis 

 is afforded by the results of Kellner's respiration experiments 

 (589). In substantially the way just outlined, Kellner com- 

 putes that while the actual chemical energy of the milk solids pro- 

 duced by his cow A was 13.907 Therms, this was equivalent to 

 only 10.367 Therms of net energy value for fattening, and there- 

 fore, that a ration supplying this amount in excess of that re- 

 quired for maintenance and body gain should be sufficient to 

 support the observed milk production. For the three cows for 

 which results are reported, the requirements for net energy as 

 thus computed compared with the estimated net energy values 

 of the rations were as follows : 



TABLE 138. 



NET ENERGY VALUES FOR FATTENING IN KELLNER'S EX- 

 PERIMENTS 



