46 NEW YORK STATE MUSEUM 



cent of tetrachlorethylene will kill both adults and eggs in half an 

 hour at ordinary temperatures. 42 



All cracks and corners of an infested camp were washed with a 

 3 per cent solution of cresol soap and were then filled up. The 

 building with a floor space of 450 meters was fumigated with 

 75 kilos of sulphur burned in 16 sulphur stoves, the burning being 

 rapid and reaching its maximum in 45 minutes. After a 3 hour 

 interval the doors and windows were opened, and except in two 

 tightly packed parcels of clothes the lice and eggs had all been 

 killed. 43 



The control of vermin in the field is difficult under the best of 

 conditions. Men should have an allotted time for the examination 

 of their clothes for the occurrence of pests, and a general inspection 

 by a company or sanitary officer should be made at least once a 

 week. Men of careless habits should receive special attention, if 

 only for the sake of their associates. 



Depediculization in an army should be on a unit basis or it 

 amounts to comparatively little, because reinfestation from occa- 

 sional carriers or adjacent verminous commands is easy and usually 

 rapid. Treatment with naphthalene or naphthalene compounds is 

 one of the simplest and more effective methods, especially in the 

 field. The most satisfactory solution of this problem is found in 

 adequate bathing facilities so arranged in case there are vermin 

 present that the men strip in one room, cleanse themselves thoroughly 

 in a bathroom and emerge at the other end where they receive 

 clean clothes or at least those which have been freed of vermin by 

 heating (ironing, dry heat or steam). The essential in this process 

 is an arrangement which will insure against reinfestation after the 

 bath and a provision for treating the clothes as rapidly as the men 

 bathe, a frequent necessity under camp conditions. Doctor Pea- 

 cock 44 recommends that each division be provided with two baths, 

 each capable of handling 80 bathers an hour, and with adequate 

 disinfesting apparatus to care for the clothes. 



Head Louse 

 Pediculus capitis DC Gecr 



The head louse is smaller than the body louse, with shorter 

 antennae and is more frequently seen on children than adults. The 



42 Kinloch. Brit. Med. Jour. 2842, p. 1040-2841. 1915. 



43 Galewsky. Deutsch. Med. Wochenschr., 41 : 652-53. 1915. 

 < 4 Brit. Med. Jour. 2892, p. 788. 1916. 



