Gr. H. F. Nuttall 
519 
regards as useful into two categories: (a) those suited for use on a small 
scale (camphor, oil of turpentine, black pepper, mercury), and ( b ) those 
applicable on a large scale (naphthaline, cresol, tar, sulphur, tobacco); 
he appears to write from a limited knowledge of the subject. Pinkus 
(1915, p. 239), after mentioning the usual remedies, recommends the 
trial of balsam of Peru and Perugen as not causing skin irritation, the 
latter being a cure for scabies and having been found to kill lice in vitro 
(no experiments described). 
To soothe the irritation due to louse bites , Castellani and Chalmers 
(1913, p. 1580), writing more particularly of Phthirus pubis, advise the 
use of a lotion consisting of calamine, 40 grains to an ounce of water. 
Oppenheim (1908, p. 332) treats the eczema with talc, zinc ointment and 
the like, recovery being rapid after the insects have been removed. 
The following pages comprise a list of insecticides that have been 
recommended in practice, the statements regarding their efficacy not 
being accompanied by other evidence than the experience of the writers 
quoted. The manner of applying the remedies is frequently not stated. 
Where such data are lacking, I have sought to supply them, and occasion¬ 
ally add remarks regarding the injurious action, etc., of the remedies. A 
number of so-called remedies, advocated by authors without any specific 
statements as to their efficacy in practice, are intentionally omitted. 
N.B. To facilitate cross references and avoid confusion with the 
numbers accompanying the records of Experiments with Insecticides 
(1-363), the data relating to the remedies that follow are numbered 
364-474. The kind of louse for which a remedy has been applied is 
indicated in each case: 
capitis standing for Pediculus humanus capitis, 
corporis ,, ,, ,, corporis, 
pubis „ Phthirus pubis. 
“lice” stands for active stages of corporis and “nits” only refers to 
the eggs of corporis throughout unless otherwise specified. 
Authors are only cited by name in the text, the fuller references to 
the bibliography being given on p. 558. 
Ref. 
No. 
364. Acetic acid 10 %, or vinegar, for capitis. 
Commonly employed to facilitate the removal of nits from the 
hair. It does not dissolve the chitinous tubes of the nits but makes 
it easy to slip them along hair with a fine comb. Warming the 
