DETERMINATION OF COCONUT OIL. 375 



It is readily seen that these results bear no relation to the amount of 

 oxygen which would be required if the end products were carbon dioxide 

 and water. They do, however, inin parallel, in a measure, to the iodine 

 numbers. We can see nothing to be gained by the employment of such 

 a method. The determination of the iodine number is easier of mani- 

 pulation, requires less time, and is more accurate. The work in other 

 directions is being continued. 



SUMMAET. 



We have demonstrated both experimentally and from the known 

 behavior of potassium permanganate that the method advanced by 

 Hodgson for the determination of an "oxygen equivalent" for fats and 

 oils has no theoretical or experimental foundation. 



The products of saponification of the different fats and oils do require 

 varying amounts of potassium permanganate for their oxidation. These 

 amounts are, in a measure, parallel to the iodine numbers. 



