CHANGES IN CONSTANTS BY FEEDING COPRA CAKE. 



43 



F. Voigtlander 22 in- comparing the American lard with the German 

 states that the higher iodine number of the former is explained by its 

 greater content of lard oil and the composition of the lard oil. The 

 American lard oil has an iodine number of about 88, while the German 

 has one between TO and 75. 71.7 per cent of the lards examined in the 

 Fabrik von Dietrich in Helfenberg had iodine numbers between 48 and 

 53. Of the American lards, 88.5 per cent examined had iodine numbers 

 between 61 and 66, and 41 per cent were over 64. The iodine numbers 

 for the fatty acids were found to be between 90 and 95 for German lards 

 and between 98 and 104 for American lards. 



From the results of this work it is evident that lean hogs will deposit 

 a body fat with constants considerably influenced by coconut oil, when 

 copra cake forms only a part of the ration. When the ration is composed 

 almost entirely of copra cake the influence upon the constants is more 

 remarkable. 



The influence of the tropical climate and that of the inherent charac- 

 teristics of the tropical hog upon the lard can not be sufficiently discussed 

 from the data at hand. It can be said, however, that the general 

 tendency of the hog grown in these environments is to deposit a firm 

 body fat having a high titre, high saponification number, and low refrac- 

 tion and iodine numbers. 



One of us (H. D. G.) is about to visit the United States. Upon 

 returning to the Philippines another series of feeding experiments will 

 be attempted, time and press of other work permitting, under our per- 

 sonal daily supervision. It is proposed to investigate the questions 

 involved with a view of obtaining sufficient data so that some accurate 

 conclusions may be drawn concerning the effect of coconut fat upon the 

 body fat of both foreign and native hogs. The investigation will, if 

 possible, be extended with the view of determining the effect of the 

 tropical environment not only on the fat of the hog but also upon the 

 fat of other animals. 



-- Loc. cit. 



