THE CONTROL OF HUMAN LICE 327 



a. Boil clothes in water five minutes. 



b. Soak woolens in hot water at 131° F. (55° C.) 15 minutes. 



c. Soak clothes in insecticides. 



1. Immerse in benzole bath for 3 hours. 



2. Wash for 15 minutes in 10 per cent solution of one of the 

 following soaps ; then wring out and dry. 



To obtain a 10 per cent solution dissolve 3 pounds in a 

 bucket of Avater. The odor will be retained a long time and 

 keep lice away. 



a. Naphtha soap 65% 

 Cresol 35% 



b. Naphtha soap 65% 

 100% crude carbolic acid 35% 



c. Naphtha soap 65% 

 Xylol 35% 



3. Soak for 10 minutes in 2 per cent solution of cresol, wring 

 out and dry. A quart of cresol in 121/2 gallons of water is enough 

 to kill the lice in the body linen of 62 men, each garment being 

 wrung out to recover as much as possible of the liquid. 



d. Handpicking, if done thoroughly and regularly, is often 

 effective. 



e. Hot ironing if done well is effective. 



CONTROL OF LICE IN LIVING QUARTERS 



In addition to control of the lice on the man and his garments, it is 

 necessary to control them in his lodgings, for the lice are quite likely to 

 be scattered through bedding and clothing, especially in army quarters, 

 and in lodging houses, and places where men subject to lice infestation 

 are likely to congregate. 



The quarters should be treated as follows: 



1. Cleanse beds with gasoline or kerosene. Permit no fires. 



2. Send bedding and linen to laundry. 



3. Fumigate mattresses and pillows in fumigation chamber with 

 cyanide as described for clothing; or, 



4. Fumigate the quarters as described above. 



When men are on active duty in war time, lice become very abundant 

 in the trenches and dugouts. The men brush themselves off and the eggs 

 and lice fall to the ground to reinfect other men. The following control 

 measures will be of assistance : 



1. Spray walls with cresol or phenol solutions 2 to 5% strength. 



2. Scrape walls, sprinkle the dust with corrosive sublimate and 

 remove. 



