THE PRODUCTION VALUES OF FEEDING STUFFS 655 



TABLE 197. EXAMPLE OF COMPUTATION OF HEAT INCREMENT IN 



SWINE 



Wellmann, in the course of experiments on the rearing of calves 

 and pigs on skim milk and modified skim milk, determined by means 

 of comparative slaughter tests the gain of flesh and fat by two pigs 

 during twenty-three and thirty-four days respectively, and also col- 

 lected the feces and urine quantitatively during the entire period of 

 feeding. The energy of the feed and excreta was determined directly. 

 Assuming a basal katabolism of noo Cals. per square meter of 

 surface (377), the heat increment due to the feed may be computed 

 as in previous cases. 



The results of the foregoing investigations are summarized 

 in Table 198. One of Wellmann's results, obtained with a 

 very restless animal, may be regarded as probably too high and 

 has been excluded. In Von der Heide and Klein's experiment 

 on palm oil the quantity of fat consumed was relatively large 

 as compared with that in Fingerling's experiment on peanut 

 oil, although the total ration was not excessive. 



Despite some irregularities, a comparison of these results 

 with those for cattle (755) shows clearly that with swine the 

 energy expenditure consequent on feed consumption is de- 

 cidedly less than with ruminants. Fingerling's results with 

 approximately pure nutrients are especially interesting in this 

 respect. As regards the more soluble carbohydrates (starch 

 and sugar) one can hardly err in ascribing the difference largely 

 to the fact that in the comparatively simple digestive organs 

 of swine fermentations occur only to a limited extent, while in 

 cattle they have been estimated to account for from 9 to 16 per 



