INSECT POWDER ‘ 29 
Thoms (<74), in 1890, reported an ash content of 6.93 pef cent in 
whole flowers of ©. canerarrefolium, and one of 6.94 per cent in the 
same after powdering. He (275) would determine the value of an 
insect powder by a determination of its ash and petroleum-ether 
extract, together with a miscroscopical examination. From Dalma- 
tian insect powder which had been dried at 100° F., Thoms obtained 
by extracting with petroleum ether 5.34 per cent of a brown-yellow 
extract (dried at 80°), which had a strong odor of insect powder. 
Other powders gave from 5 to 3.89 per cent. An adulterated insect 
powder gave only 3.83 per cent extract, without the characteristic 
odor. Flowers of C. leucanthemum (Hungarian daisy) yielded 4.02 
per cent extract. 
The Chemist and Druggist for March 22, 1890 (17) reports an ash 
content of 6 per cent on a sample of insect powder prepared from 
flowers grown in Gippsland, the southeastern district of Victoria, 
Australia. | 
EKymard (77), 1890, gives the analysis of Pyrethrum powder shown 
in Table 11. 
TaBLe 11.—Analysis of Pyrethrum powder (Eymard) 
1 SSIS SUE TIES (E22 a a ae a Small amount. 
Bodies soluble in ether (5.60 per cent) composed of: 
RECs) OCICS PCIGeN Ue ae eon Sos ar noe An ae 3. 80 
PeCcinOlUsabOUIES (MER Cents = ac a ee 1. 80 
Bodies soluble in alcohol (94.4 per cent (sic)) composed of: 
noma whe sthepMenicem ty) esta wk eed Re Re 4. 80 
Riant aibumen, (per ceni)y ins. | ers a i Lr® 
Caminvasiiostaneessoer Cent) jee So be Sh 14. 75 
fmuhneand-soluble:amidon:(pericent)...- = 5 «2 8. 50 
Mineralcallis. (percent). i = ner aes SB esr aN es 7. 88 
Woody matter, by difference (per cent)_____--______*+___- Ha, 772 
fikey tam Clement) 2a: tee ee 2h a a Ds a ee 100. 00 
Mineral matter: 
Poiascam chien (penrecent).- 2 1 
Czlemuin Carbonate (per cent) 45... Ba soe 4, 
Calcrrmr phosphates(pert cent)m Ste 5 err his eee Orlr/; 
Front ame ssilicart( pet Cent) 32.0 kk a a 1 
7. 88 
Thompson (273) gives the results of the analysis of a number of 
“genuine” insect powders (‘Table 12). 
TaBLE 12.—Analysis of ‘““genwine’’ insect powder (Thompson) 
| 
| 
up le Color Ash 
Per cent 
i TESST Ss 2 SS RE ee a Ue nn he ea Ce | 6.5 
PRC LOVASHE DEG wae 4 eer eee t RAPT eb rember se A mreseegrye dere: Fla bd ale 6.6 
SRE ELTUEG ONO WAGTIC DLO WI == oe ew, Ey rr ee A ee a ee 6.9 
4+) Loin chy) Bes? op Oe he Se ee Be She 8 Ot SG BS SONNE RS TE OR eee eee wes i ee 6. 59 
Se eoti ey COIS EDO Wits abo Bowe Dol ee A ee Be 6. 2 
Of two samples which contained iead chromate, one was deep 
yellow, with 12.6 per cent of ash, while the other was dark yellow, 
with 26.8 per cent of ash. 
