20 
Circular 23 - Reference Index 
Dry heat (to control) 
(Cont'd) 
lice in clothing 
" 9-12. 
Pediculoides ven- 
tricosus . . .Y.15-2°» 
powder-post beetles 
....••• 6-12 • 
Dry ice 
insecticidal use 
^ 21-13. 
solid carbon 
dioxide 21-14. 
Dryness (to control) 
food insects. .. .4-5* 
Duponol W. A. 
characteristics 
manufacturers and 
distributors 21-28. 
use 7-19; 21-28. 
Durango scorpion 
(Centruroides suffusus 
Pocock) 
deaths from. . .15-20. 
Dusters (or dusting 
equipment) . . .20-4,33- 
airplane 20-40. 
bellows or knapsack 
20-35. 
care'.*. 20-4. 
dust goggles.. 20-48. 
dust mixers. . .20-30. 
fan or blower 20-3o. 
Plunger 2 3t\^ 
power 20-38. 
requirements and 
types 20 "^a* 
respirators . . . 20-48 . 
Dust mixers 
manufacturers and 
distributors. .20-39. 
types 20-38,39. 
Ear mites of dogs^ 
(Otodectes cynotis 
(Bering ) ) 
control of mange 
from 19-19- 
description; habits; 
life cycle. .. .19-18. 
female ( illus . ) 19-18 • 
irritation from 
19-19. 
Eciton spp. (see 
Legionary ants) 
Electric atomizers 
description. . .20-7,8. 
manufacturers and 
distributors. . .20-9. 
Electrocutors (insect) 
for killing house- 
flies I!" 1 !' 
use; types; manufact- 
urers and distribu- 
tors 20-47. 
Emulsifier 
Aresket <!±-o. 
definition; types 
21-5. 
Duponol W.A. • . .21-28. 
Gardinol W.A... 21-35- 
Orvus W.A 21-57. 
Emulsions (spray) 
definition; prepara- 
tion 21-5. 
