34 
BULLETIN 824, U. S. DEPARTMENT OF AGRICULTURE. 
Unger (282) reports certain results of examination of Pyrethrum 
flowers (Table 7). 
Table 7. — Chemical analysis of Pyrethrum flowers and powder ( Unger). 
Product. 
Determination. 
Sam- 
ple 
Moisture. 
Ash on 
water- 
free 
basis. 
Remarks. 
No. 
Dried 
over 
H 2 S0 4 . 
iLossat 
100°. 
1 
Closed Dalmatian flowers 
Per cent. 
7.02 
12.08 
Per cent. 
8.4 
Per cent. 
7.67 Much manganese present. 
6.89 i Do. 
2 
do 
3 
11.45 
5.49 
10.29 
6.76 
5.39 
6.04 ' Do. 
4 
7.07 Do. 
Closed Dalmatian flowers 
10.81 
7.12 Do. 
6 
Powdered closed Dalmatian flowers. 
7.56 | 
6.21 ' Do 
Three samples of flowers, 2 of Pyrethrum roseum and 1 of P. cau- 
casicum, grown near Berlin, were examined, the results in Table £ 
being secured. 
Table 8. — Chemical analysis of insect flowers grown near Berlin. 
Product. 
Determination. 
Sam- 
Mois- 
ture 
(loss at 
100°). 
Ash on 
water- 
free 
basis. 
Remarks. 
1 
Per cent. 
8.3 
5.67 
4.88 
Per cent. 
8.18 
7.92 
10.21 
Much iron present, but no manganese. 
Iron (0.19 per cent) present. 
2 
3 
Flowers of P. carneum 
Unger (282) reports the analyses given in Table 9 for adulterated 
insect powders. 
Table 9. — Chemical analysis of adulterated insect powders ( Unger). 
Sample 
No. 
Product. 
Ash. 
Remarks. 
1 
2 
Insect powder 
do 
Per cent. 
6.61 
9.7 
7.3 
7.93 
Stems present: almost no pollen grains. 
Curcuma and stems present; pollen grains few. 
Curcuma present; no manganese. 
Barium chromate and many stems present: no pollen grains. 
Lead chromate and many stems present; few pollen grains. 
Very little manganese; curcuma present. 
3 
do 
4 
do 
5 
6 
....do 
....do 
8.33 
7.39 
