18 



The inspection of the tables shows some interesting results, but 

 owing to the small number of trials no law can be deduced from 

 them. 



PALM OIL. 







was fed to Duchess, immediately after the preparatory ration, in 

 ration (9), and there was no change in the volatile acids or the 

 iodine number from the normal progress of lactation. Stearin, 

 ration (15), was next fed and produced no effect on the iodine 

 number, but by comparing the volatile acids with the two preced- 

 ing periods and with those following, especially the pasture period 

 of July 4, nearly four months after the preparatory ration, it ap- 

 peared that the volatile acids were decreased. By the same method 

 of comparison, cotton-seed oil in ration (15) raised the iodine num- 

 ber, and while increasing the volatile acids over the stearin ration, 

 did not make them of normal quantity. By the same line of 

 reasoning palm oil had a similar effect to cotton-seed oil, though 

 less noticeable. Cotton-seed oil in ration (1 1), fed to Maramee 

 after the preparatory period, showed a very decided action upon 

 the volatile acids and iodine number, and in the same direction as 

 when fed to Duchess. 



Corn oil was fed to Princess Leto in ration (10) after the pre- 

 paratory period. There is no effect on the volatile acids, but the 

 iodine number rose abruptly from 28.4 to 38.1. The ration (12) 

 fed to Princess was used because the vetch hay had become ex- 

 hausted. The only change was in feeding clover hay instead of 

 equal parts of clover and vetch. The result was to bring the 

 iodine number back to a more normal amount. Olein or oleo oil 

 was next fed in ration (14) and produced a decided rise in the vol- 

 atile acids, while the iodine number was slightly decreased. 

 Cocoa-nut oil followed the olein and caused a sharp decrease in 

 the iodine number. With Princess Leto, the pasture periods show 

 a peculiar condition with regard to volatile acids, inasmuch that 

 they are higher than in any period during the experiment, although 

 from one to two months had elapsed. 



SUMMING UP 



the results of these trials, it was shown that the volatile acids were 

 only slightly affected, but on the whole were decreased, by feeding 



