528 
Combating Lousiness 
Ref. 
No. 
to the British Army and is used in the strength of 4 oz. per gallon 
of water for soaking clothes 30 minutes (Lelean). 
Expt20 (also footnote): 5 % solution killed nits and lice immersed 
therein in 30 minutes; 3-5 % killed in 1 hr; 1 % killed in 1 hr; 
the soap only useful for cleaning. Expt 65: doubtful. Expts 331, 
335: it is moderately insecticidal for lice in contact with flannel 
wrung out in it and worn near the body. (See p. 582, note to 
Bacot and Lloyd.) 
396. Cresol (35 %), soap (65 %) and petroleum, for corporis in clothing. 
Efficient, convenient, kills lice and nits quickly, smell clings to 
clothes and repels lice for weeks. Use it in 10 % watery solution to 
soak undergarments, apply it with a brush to outer clothes. 
Soulima and Ebert state it is the best remedy they have found in 
their Russian experience. The Official Instructions (Russian) 
recommend its being brushed into seams and folds of clothing which 
is then dried and brushed to remove dead lice. Underclothes are 
merely dried after steeping. 
Cresol, monochlor. Expts 329, 330, 333, 334: not promising. 
397. Cyclohexanone, for corporis on body and clothes. 
German daily press states that when sprayed or applied as 
powder to the body and clothes of men in bed, it kills lice and nits 
in 5 hrs and subsequently acts as a preventive (Pharmaceut. Journ. 
19. vi. 15); cutting kindly supplied by Dr Andrew Balfour who 
informs me that it (C 6 H 12 ) is obtained by the complete reduction of 
benzine (C 6 H 6 ). 
Expts 276, 276a: stated to kill most lice in 2-3 hrs, read foot¬ 
note; a further trial desirable. 
398. Ether, for corporis, condemned as too expensive and inflammable 
(Frankel). 
Expts 23-25: nits survive immersion for 1 minute. Expt 67: 
nits survived being moistened for 15 minutes. Expt 157: nits 
survived vapour 5 minutes. Expt 351: pubis immobilized in |-1 
minute and killed in 1 minute, vapour killed in 5 minutes. 
399. Formalin, for corporis in clothing. 
Condemned as useless by Zucker and also by Orticoni. 7-5 % 
solution advocated as a spray for blankets by Dore. Gaud recom¬ 
mends its use adding a solution thereof to a warm permanganate 
solution in a barrel which serves as a generator (see original). 
Expts 159-162: the vapour killed § lice in 6 hrs but left the nits 
