540 
Combating Lousiness 
Ref. 
No. 
survived for 8J days in shirts dusted with Oxford powder and 
that he found it of no value when tested on a naturally infested 
man. There is therefore no apparent reason why these preparations 
should be used in conjunction with naphthaline; they are merely 
ballast. None of the insecticides tested by Bacot equalled naph¬ 
thaline, especially the crude “unwhizzed” product (see footnote, 
p. 537). Good results were however obtained with Parasitox (see 
Expt 289). 
The mixture of naphthaline (g) with soft soap alone or (h) with 
diatomaceous earth is found to offer distinct advantages. Mr Bacot 
informs me (26. n. 1918) that he and Colonel Monckton Copeman, 
as the result of their experiments, recommended a mixture con¬ 
sisting of crude unwhizzed naphthaline and soft soap, 3:1, for 
use in the army; that the proportions were subsequently altered to 
9:1, and still later diatomaceous earth was added by the military 
authorities so that the preparation might be used in hot climates 
(at 35° C.). Bacot states, however, that the original 3 : 1 mixture 
withstands this temperature perfectly well. N.C.I. powder in the 
same way retains its potency longer when mixed with soft soap. 
The soft soap by spreading in fabrics distributes the naphthaline 
so that it comes in contact with the insects and it prevents the 
wastage that occurs when it is used in powder form. 
430. Naphthaline-and sulphur-steeped undergarments have been dis¬ 
tributed to soldiers by certain agencies, it is claimed with benefit 
(see No. 107). 
431. Naphtho-benzol-ammonia mixture, for corporis, consists of 5 % 
naphthaline in saturated solution of ammonia gas in benzine. 
When heated to 40-50° C., it is stated to give good results in the 
Italian army when applied as a fumigant to piles of clothing. The 
solution may also be added to powder for individual use (Izar, cited 
by Galli-Valerio, and by Grixoni). 
432. Naphthol oil (5 %), for capitis. 
Useful, but should not be applied to white hair which becomes 
irrevocably stained yellow (Pinkus). 
433. /3-naphthol pomade (5 % in vaseline), for capitis and pubis. 
Recommended for capitis on children where excoriations are 
present (also for crab-lice Dubreuilh and Beille, Lagane); after¬ 
wards washing with Panama wood decoction (Brurnpt, who gives 
5-10 % pomade). 
