INSECT POWDER. 
55 
The petroleum-ether extract of flowers does not differ enough from 
that of stems to make this determination of value in arriving at the 
amount of stems present. 
Pentosans were determined in a few of the samples, and it was 
found that the amounts in the different forms of flowers differed but 
little from each other and also but little from that in the stems. 
The determination of crude fiber is of value in indicating whether 
or not the powder has been made from open or closed flowers. Pen- 
tosans and crude fiber were determined according to the methods 
of the Association of Official Agricultural Chemists (Jour. A. O. A. C, 
Vol. II, No. 1, Pt. II, pp. 52-53, 60-61). 
Table 33. — Determination of ether extract and petroleum-ether extract. 
■-- 
Determination. 
Sample No.' 
Determination. 
Sample No.i 
Ether 
extract. 
Petro- 
leum- 
ether 
extract. 
Ether 
extract. 
Petro- 
leum- 
ether 
extract. 
"Closed" flowers: 
14920 
Per cent. 
Per cent. 
4.75 
"Open" flowers — Continued. 
15008 
Per cent. 
5.09 
Per cent. 
14921 
7.45 
7.18 
6.85 
5.99 
7.34 
6.41 
14929 
5.03 
5.09 
6.60 
5.81 
8 
3.50 
14932 
Maximum 
Average 
No. samples analyzed. . . 
Stems: 
14922 
4.70 
14934 
3.05 
3.93 
3.80 
4.06 
14938 
8 
15009 
3.15 
3.35 
2.88 
2.34 
8.98 
3.43 
5.99 
7.45 
6.87 
6 
3.05 
5.03 
4.11 
5 
1.95 
14925 
2.08 
14928 
1.93 
No. samples analyzed . . 
14931 
1.53 
5.48 
5.73 
6.28 
3.64 
3.98 
4.45 
4.70 
14946 
1.75 
14923 
14960 : 
2.78 
14924 
15010 
3.40 
1.78 
Minimum 
14930 
2.34 
3.98 
3.22 
7 
1.53 
14936 . . 
6.00 
2.78 
14939 
3.53 
5.05 
3.50 
3.60 
1.97 
14945 
6.60 
5.35 
5.93 
No. samples analyzed. . . 
7 
14961 
14962 
1 All samples were obtained from Europe. 
Table 34. — Determination of pentosans. 
Sample No. 1 
Pento- 
sans. 
Sample No. 1 
Pento- 
sans. 
"Closed" flowers: 
12321 . . 
Per cent. 
17.75 
16.06 
16.18 
16.53 
16.80 
"Open" flowers— Continued. 
12332 
Per cent. 
19.98 
12325 
12327.. 
19.98 
12334 
Maximum 
21.72 
12335 
21.11 
Stems: 
12322 
16.06 
17.75 
16.66 
18.40 
12326 
12328 
18.78 
17 54 
"Open" flowers: 
12320 
21.42 
21.07 
21.72 
21.34 
12333 
18.40 
12336 
17.95 
12324 
17.54 
12329 
18.78 
18.21 
All samples were obtained from Europe. 
