7"» 
Circular 23 - Reference Index 
Food supplies (Cont'd) 
dry heat as inseot 
control 4-4. 
fumigation 4-6. 
carbon tetrachlo- 
ride 21-15. 
ethylene diohloride 
-carbon tetrachlo- 
ride 21-^3,29. 
ethylene oxide 
22-14. 
hydrocyanio acid 
gas 21-37,39. 
methyl bromide not 
recommended 
22-17. 
naphthalene not 
suitable 
21-54; 22-18. 
paradiohloroben- 
zene not suitable 
21-59; 22-19. 
prevention of inseot 
infestation 
avoid long storage 
4-3. 
oold or dry stor- 
age 4-5. 
inspection of in- 
coming supplies 
11-5. 
purchase of 4 nsect- 
free products 
4-3. 
refrigeration 
8-17. 
sanitation. . . .4-4. 
storage in tight 
containers. . .4-5 • 
transport ant in- 
festations. . . .15-6. 
Foot mange of horses 
(see Diseases) 
Foundations (in relation 
to termite prevention) 
conorete platforms or 
ground slabs. . .2-21. 
cracks or voids 
2-6,7,8; 2A-2,5. 
dryness essential 
2-11. 
grading... 2-11; 2A-4. 
imperviousness essen- 
tial... 2-13; 2A-3,5. 
inspection. . . .2-7,13* 
metal barriers; 
shields; aprons 
2-14,24,34; 2A-4,5. 
porches and terraoes 
2-13; 2A-4. 
poured concrete 2-13. 
pressure-treated or 
naturally resistant 
wood 2-22,24. 
shelter tubes on sur- 
faoe 2-5,7,13, 
31,(illus.)2-5,6,31. 
skirting between piers 
2-18,20. 
use of soil poisons 
around 2-36 . 
ventilation 
2-11,30; 2A-4. 
windows or openings 
below grade. .. .2-18. 
wooden piers or posts 
2-13. 
wooden porches or 
steps 2-18. 
Fresh water (see Water, 
fresh) 
Fresh water marshes 
(see Marshes) 
