6 5 6 



NUTRITION OF FARM ANIMALS 



cent of the total increment in heat production. Straw pulp, on 

 the contrary, caused fully as great an increase in the heat pro- 

 duction of swine as in that of cattle. Fingerling explains this 

 upon the supposition that the straw pulp was fermented rather 

 than digested. He failed, however, to find any corresponding 

 excretion of methane (745), and Von der Heide, Steuber and 

 Zuntz 1 have observed only a relatively small evolution of com- 

 bustible gases from this material in case of the horse. The 

 differences as regards oil and protein are not readily explicable 

 since, according to Kellner, they are not subject to the methane 

 fermentation. 



TABLE 198. INCREMENT OF HEAT PRODUCTION BY SWINE 



1 Biochem. Ztschr., 74 (1916), 161. 



