Circular 23 - Reference Index 
51 
Selection (of stock) 
against powder-post 
beetles 6-5. 
Shelter tubes of 
termites 
construction 
2-7,13,24. 
destruction. . . .2-31. 
illustrations 
2-5,6,31. 
Shields (metal) 
termite prevention 
or control 
mechanical block- 
ing with. . . .2-33* 
requirements for 
installation 
2-28. 
types 2-25. 
breadpan. . .2-25, 
(illus. )2-10,12, 
15. 
strip 2- 
26, (illus. )2-l6. 
use 2-13,14,21,24; 
2A-5; (illus. )2-10, 
12,15,16,17,20,27, 
29. 
Silverfish 
control 21-66. 
Silver nitrate 
characteristics ; 
caution 21-68. 
cost; availability 
21-69. 
disinfectant for tick 
wounds 12-14; 21-68. 
Siphona irritans L. 
(see Horn flies) 
Soap 
use as emulsifier 
21-5. 
use to control 
body lice 9-10. 
Sarcoptes scabiei 
15-21. 
ticks 12-18. 
Soapstone (powdered) 
diluent for Paris 
green 7-19. 
Sodium arsenite 
characteristics; cost; 
caution 21-69. 
manufacturers and 
distributors. . 21-70. 
uses 
general 21-69 . 
livestock dip 
21-69. 
Doison ant bait 
15-8,9. 
soil poison for ter- 
mites 2-36; 21-69. 
Sodium benzoate 
characteristics; cost; 
manufacturers and 
distributors; uses 
21-70. 
Sodium bicarbonate 
characteristics ; 
availability; uses 
21-71. 
Sodium cyanide 
characteristics; ef- 
fects. .21-38; 22-26. 
cost; availability 
21-39. 
