G. H. F. Nuttall 
537 
Ref 
No. 
are intermixed (as do soap or vaseline, v. infra). Bacot’s experi¬ 
ments prove that “crude unwhizzed” naphthaline, which includes 
tarry oils, is much more potent than “crude whizzed” or “crude 
drained” naphthaline 1 . See further under Nos. 424-431, and 
experiments with repellants, p. 488. 
Objections to naphthaline: many men object to the odour and skin 
lesions may be produced thereby, especially when coarser particles 
come in contact with the skin (Lohe). As ordinarily employed it 
does not appear to do harm, but it should not be allowed to come in 
contact with the eyes (Axenfeld). It may produce irritation of the 
kidneys (Meltzer). 
424. Naphthaline ointment (5 % in vaseline), for corporis, applied to the 
skin, is recommended by Blaschko (i. 1915) and praised by Kisskalt 
and Friedmann who state, however, that it must be used plentifully 
to be of use. 
425. Naphthaline and camphor sachets (for corporis), containing these 
ingredients in the proportions 9:1, the amount per man being 
5^ oz., are recommended by Pasini for soldiers in Italy. The sachets 
are worn outside the underclothes on breast, back, waist and ankles 
(Corsini). See No. 427. 
426. Naphthaline, camphor and benzine sachets or powder (sawdust as 
vehicle), for corporis, are recommended by Noel. 
427. Naphthaline and creosote sachets (for corporis) are recommended 
by Pelizzari for use in the Italian army, being worn as with No. 425, 
between the underclothes and uniform, not against the skin. The 
sachets contain coarse naphthaline 100 pts and creosote 2 pts, the 
amount per man being ca. 4 oz. (Corsini). 
428. Naphthaline 96 pts, creosote 2 pts and iodoform 2 pts, known as 
N.C.I. powder and used in the British Army, for dusting on the 
clothes and body (for corporis). 
The directions are to dust 1 oz. per man inside all clothing once 
weekly, it being best if the men roll themselves tightly in their 
blankets overnight. The lice are stated to be mostly dead next 
1 Naphthaline comes into the market in various degrees of purity. Pure naphthaline is 
much more expensive than the impure. Mr Bacot (3. m. 1918) informs me that the crude 
product, obtained in the preparation of coke, is collected in a still. The impure form is 
dark brown, oily, and therefore tends to cake. This product is centrifugalized (“ whizzed”) 
to partly purify it, when it appears pale brownish-grey but is still oily and inclined to cling. 
The “ drained ” product, likewise crude, only differs from the last in being somewhat paler 
and drier. “ Unwhizzed” naphthaline represents the first non-centrifugalized product. 
