1000 Wisconsin Academy of Sciences, Arts , and Letters. 
laboratory and those reported in the literature are given in the 
tables which follow: 
Table 19 .—Ash contents of laboratory preparations. 
Sample 
No. 
Date 
Observer 
Solvent 
Per cent 
of ash. 
1. 
1904 
Dieterich . 
Ether.... 
0.36 
1. 
1916 
Du Mez ... 
0.26 
2. 
Acetone... 
0.31 
' 
Table 20 —Ash contents of commercial oleoresins. 
Sample 
No. 
Date 
Observer 
Source 
Per cent 
of ash 
Fereign con¬ 
stituents 
1. 
1891 
Dieterich ........ 
Germany... 
0.40 
1. 
1893 
0.45 
2. 
“ 
0.50 
3. 
“ 
0.50 
1.. 
1894 
0.42 
2. 
0.50 
3. 
“ 
0.55 
1. 
1895 
0.50 
1......... 
1896 
“ 
0.45 
1. 
1897 
0.43 
2. 
0.52 
1. 
1901 
0.32 
1. 
1903 
“ 
0.27 
2. 
0.30 
3. 
“ 
“ 
0.39 
1.... 
1904 
0.36 
2. 
0.83 
1. 
1905 
0.26 
2. 
0.46 
1.. 
1914 
Linke... 
Brueckner, Lampe & Co .. 
0.34 
Copper 
2. 
Caesar & Loretz. 
0.41 
3. 
“ 
»« 
Riedel. 
0.52 
“ 
4.. 
“ 
“ 
Merck & Co. 
0.52 
1.. 
1916 
Du Mez...... 
Lilly & Co........... 
0.58 
Copper 
2. 
Squibb & Sons. 
0.54( 1 ) 
3. 
“ 
“ 
Parke, Davis & Co. 
0.80 
“ 
4. 
“ 
Stearns & Co. 
0.82 
“ 
O) Contained unevaporated solvent—ether. 
Acid number: The acid numbers 82.2 and 82.7 were ob¬ 
tained for the oleoresins prepared in the laboratory. Inas¬ 
much, however, as these preparations were made six years 
previous to the time when the determinations were made, it is 
thought that the value of this constant would be somewhat 
lower for the oleoresin when freshly prepared. This state¬ 
ment is based on the assumption that the acidity of the prep¬ 
aration will increase on standing due to the partial hydrolysis 
of the glycerides of the fatty acids and to the breaking down 
of the complex substances constituting the so-called crude filiein. 
