INSECT POWDER. 



55 



The petroleum-ether extract of flowers docs 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.i 



Determination. 



Sample No.> 



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. 

 5.00 



Per cent. 



14921 



7.45 

 7.18 

 6.85 

 5.99 

 7.34 

 6.41 



Minimum 





14929 



5.03 



5.09 

 6.60 

 5.81 

 8 



3.50 



14932 



MaxiTniim 



4.70 



14934 



3.05 

 3.93 

 3.80 



Average 



4.06 



14938 



No. samples analyzed. . . 



Stems: 



14922 



8 









3.15 

 3.35 

 2.88 

 2.34 

 3.98 

 3.43 







5.99 

 7.45 

 6.87 

 6 



3.05 

 5.03 

 4.11 

 5 



1.95 





14925 



2.08 



Average 



14928 



1.93 



No. samples analyzed . . 



14931 



1.53 



14937 





"Open" flowers: 



14923 



5.4S 

 5.73 

 6.28 



3.64 

 3.98 

 4.45 

 4.70 



14946 



1.75 



14960 



2.78 



14924 



15010 



3.40 



1.78 



14927 



Minimum 





14930 



2.34 

 3.98 

 3.22 

 7 



1.53 



14936 



6.00 



Maximum 



Average 



No. samples analyzed. . . 



2.78 



14939 



3.53 



5.05 

 3. .50 

 3.60 



1.97 



14945 



6.60 

 5.35 

 5.93 



7 



14961 





14962 









1 All samples were obtained from Europe. 

 Table 34.— Determination of pentosans. 



ofiinple No.i 



Pento- 

 sans. 



Sample No.i 



Pento- 

 sans. 



"Closed" flowers: 



12321 



Per cent. 

 17.75 

 16.06 

 16.18 

 16.53 

 16.80 



"Open" flowers— Continued. 



12332 



Per cerit. 



19.98 



12325 



Minimum . 





12327 .... 



19.98 



12334 





21.72 



12335 



Average (5 samples) 



21.11 





Stems: 



12322 



12326 . -. 







16.06 

 17.75 

 16.66 





Maximum . ... 



18.40 





18.78 





12328 



12333 



17.54 

 18.40 



"Open" flowers: 



12320 



21.42 

 21.07 

 21.72 

 21.34 



12336 



17.95 



12323 







12324 



17.54 



12329 





18.78 







18.21 









All samples were obtained from Europe. 



