174 
IOWA ACADEMY OF SCIENCES. 
SAPONIFICATION VALUE. 
The saponification value was made by the well known 
Kottstorfer method. Three determinations gave the fol- 
lowing results: 
(I) 2.0005 grams of oil required 0.3908 grams of KOH. 
(II) 1.8923 grams of oil required 0.3681 grams of KOH. 
(Ill) 1.9096 grams of oil required 0.3707 grams of KOH. 
Calculated milligrams of KOH per gram of oil: 
(1) (II) fill) Average. 
195.3 194 9 194.13 194.7 
IODINE VALUE. 
In making the iodine value determination, Hubl’s 
method was followed, results of which were as follows: 
1. 0.1611 gram of oil required 0.014155 gram iodine. 
2. 0.1668 gram of oil required 0.014339 gram iodine. 
3. 0.1737 gram of oil required 0.014848 gram iodine. 
Per cent of iodine found: 
(1) (2) (3) Average. 
87.86 85.96 86.48 86.4 
ACID VALUE. 
The acid value was determined by the regular method 
of titrating with standard potassium hydroxide solution. 
Two determinations gave the following results: 
1. 8.5585 grams of oil required 0.02285 gram of KOH. 
2. 7.6232 grams of oil required 0.02146 gram of KOH. 
Calculated acid value: 
(1) (2) 
2.67 2,81 
GLYCEROLE DETERMINATION. 
Glycerole was determined by the Benedict Zsigmondy 
method, that is the oxidation of glycerole to oxalic acid by 
means of potassium permanganate. Two determinations 
gave an average of 8.81 per cent of glycerole. 
