Circular 21 - Inaeoticides and Subsidiary Materials 24 
CRESOLS 
In the control of body lice by chemicals, 
cresol solutions have been recommended for 
infested articles which may be damaged by other 
materials and for spraying into cracks in floors 
and walls. 
Commercial cresol contains three sub- 
stances, CH0C5H/OH resembling phenol, which 
are distinguished as orthocresol, metacresol, 
and paracresol. It is obtained from coal tar, 
wood tar, and petroleum, as a colorless liquid 
or oily solid, said is used in disinfectants, 
fumigants, medicines, and many other products. 
The cost of cresol in 450 to 8$0 pound 
drums ranges from IO-I/4 to 10-3/4 cents per 
pound. In smaller lots it may be obtained in 
bottles at the rate of one pound for 40 cents, 
five po\inds at 33 cents per pound, and 40 
pounds at 22 cents per pound. 
For manufacturers and distributors see 
numbers 4, 19, 23, 30, 70, 73, 75, and 76 of 
list at end of this circular. 
CUBE POWDER 
This material may be used in the same 
way as derris powder to kill fleas infesting 
cats, dogs, and other animals. The cube pow- 
der may be applied pure or mixed with talc as 
in the case of derris (page 25). A similar 
method of application is prescribed. Cube 
powder may be used to kill human body and 
pubic lice, also lice and ticks infesting 
domestic animals and livestock. 
