DISINFESTATION 63 



and the effect will last several days. It will be 

 found to be equally useful for the head- and 

 crab-louse. It should not, however, be made to 

 supersede treatment by heat. It is an additional 

 remedy and not an alternative one when heat 

 is available. 



N.C.I, is a powder composed of crushed 

 naphthalene with 2 per cent creosote and 2 per 

 cent iodoform. It has been used in the Army, 

 and Peacock (4), who carefully investigated its 

 effect, spoke very favourably of it. It should be 

 dusted inside the underclothing, and its killing 

 and deterrent action lasts for several days. It 

 causes a little irritation where the skin is moist. 



Vermijelli is a proprietary name for a refined 

 form of a remedy recommended by Professor 

 Maxwell Lefroy, who states that the formula is 

 crude mineral oil 5| pints, soft soap 3 Ibs., water 

 about | a pint. This is rubbed all over the body 

 and inside the underclothing. Its action is prob- 

 ably the same as that of any other grease, namely 

 that it runs into the breathing holes of the 

 insects and smothers them. It is less unpleasant 

 in use than most remedies. 



Sulphur has an entirely false reputation as a 

 louse-destroyer. It is used by people in the 

 East End of London and amongst hop-pickers, 

 who carry a lump of it in the pocket as a talis- 

 man against the pest. A person can, however, 

 eat sulphur, as we have proved, until the odour 

 from the skin is perceptible at a distance of a 



