CHANGES IN CONSTANTS BY FEEDING COPRA CAKE. 



37 



In addition to the copra cake and corn, both lots were given an equal 

 amount of green forage, sorghum, teosinte, velvet bean, or grass. 

 Further data were not kept. 



In commenting upon this feeding experiment Dr. H. 1ST. Knight, of 

 the Bureau of Agriculture, says : 



"Considerable difficulty was experienced in getting the pigs fed on copra to 

 eat a ration of pure copra. This has been observed in other cases. A hog six 

 or 8 months old does not take readily to a ration of pure copra meal, while a 

 pig of 2 months will start eating a pure copra ration as readily as a ration of 

 pure corn. For this reason the copra-fed hogs did not start putting on flesh 

 as soon as did the corn-fed ones, and consequently we were longer in finishing 

 the copra-fed lot. 



"My observation on this test, as well as on some others, indicate that it is 

 inadvisable to feed a ration of pure copra meal, especially where one is finishing 

 aged hogs. It does, however, make a very satisfactory feed when used in com- 

 bination with other feed stuffs." 



When the bogs had attained their growth they were carefully marked 

 and shipped to Manila where they were slaughtered under our direction 

 and supervision and the desired samples of fat at once removed and 

 placed in glass bottles. The lards were rendered in a steam bath at 

 100° and filtered through paper filters in a steam- jacketed funnel. 



The constants were determined in every case in duplicate and in the 

 case of the iodine numbers over 60 determinations were made by three 

 different persons with different Hanus solutions. 



The results are condensed in Tables II and Ila. 



Table II. — Constants of lards from corn-fed hogs. 



Kind of lard. 



Titre. 



Refrac- 

 tion, 



butyro 

 scale. 



Koett- 



storfer 



numbers. 



Iodine 

 number 

 of lards, 



Hanus. 



48.8 



Iodine 

 number 

 fatty- 

 acids, 

 Hanus. 



Free 



acids 



(asoleie). 



Intestinal fat: 



Hog No. 1 



•41.6 

 43.7 



41.6 

 43.8 



«, 



42.7 



43.5 

 42. 5 



44.6 

 45.5 



46.0 

 46.0 



196.0 



196. 1 



199.0 



198.0 



196. 2 

 196.1 



53.3 



7.17 

 7.75 



9.89 

 5.08 



3.72 

 3.27 



Hog No 2 



47.2 50.3 



52.7 53.8 

 46.7 ! 50.0 



1 

 49.1 | 50.4 



51. 7 52. 3 



Kidney fat: 



Hog No. 1 



Hog No. 2 



Leaf lard: 



Hog No. 1 



Hog No. 2 









