THE PRODUCTION VALUES OF FEEDING STUFFS 653 



756. Results on sheep. In a series of respiration experi- 

 ments upon two sheep by Kern and Wattenberg, reported by 

 Henneberg and Pfeiffer, 1 varying amounts of nearly pure pro- 

 tein in the form of conglutin or of flesh meal were added to a 

 basal ration of hay and barley meal. The writer 2 has com- 

 puted from the recorded results of these experiments the metab- 

 olizable energy of the additions to the basal ration and the 

 energy of the resulting gain. The difference between the. two 

 shows the amount of' energy lost as heat. 



TABLE 196. INCREMENT OF' HEAT PRODUCTION BY SHEEP 



The results are notably lower than those obtained by Kellner 

 for wheat gluten fed to cattle, although in the three middle 

 periods they are higher than those found with that species for 

 other concentrates, but there are several points of uncertainty 

 in the experimental results and the method of computation is 

 an approximate one. On the whole, pending further investi- 

 gation, it appears probable that the results obtained with cattle 

 may, without very serious error, be regarded as applicable to 

 other species of ruminants. 



757. Results on swine. The data regarding the increment 

 of heat production consequent on the consumption of feed by 

 swine, although more abundant than those for sheep, are still 

 rather meager. Respiration experiments made by Meissl, 

 Strohmer and Lorenz 3 in a study of the sources of animal fat, 



1 Jour. Landw., 38 (1890), 215. 2 Principles of Animal Nutrition, pp. 463-465. 

 'Ztschr. Biol., 22 (1886), 63. 



