49(3 
Combating Lousiness 
Stage 
Result 
Authority. 
Ref. 
Insecticide 
tested 
+= 
killed in ' = mins. 
Key to ref. 
No. 
used 
At ° C. 
n. = nits 
± = 
some killed in 
at end of 
1. = lice 
o = 
survived exposure of " = secs. 
table 
42 
Sublimate, 0-25 % 
21-5° 
n. 
+ 
V 1 killed . 
N. 
in 10 % glycerine- 
water 
43 
Sublimate vinegar 
— 
n. 
4- 
1 J hrs 
S. 
(17 % acetic) 
44 
Sublimate vinegar 
— 
n. 
+ 
over 30' needed ... 
H. 
(1 : 299) 
45 
Sublimate, 0-2 % in 
21-5° 
n. 
+ 
2-V | killed . 
N. 
vinegar(ordinary) 
46 
Westoran, 2 % in 
21-5° 
n. 
o 
5' ? survived ... 
N. 
water 
21-5° 
n. 
o 
10 ' | „ . 
N. 
47 
Westropol. 2 % in 
21-5° 
n. 
o 
K' A 
N. 
water 
21-5° 
n. 
o 
10' f „ . 
N. 
48 
Xylol . 
— 
i. 
o 
i' . 
Hi. 
49 
5 J ... ... 
— 
i. 
+ 
il' . 
Hi. 
50 
19° 
n. 
o 
l|' | survived ... 
N. 
51 
jj ... ... 
19° 
n. 
o 
2 ' 4 ,, 
N. 
52 
99 *•• • • • 
19° 
n. 
o 
10 ' % „ . 
N. 
References to authors. 
H. = Heymann (18. vm. 15, p. 310). 
Hi. = Hindle MS. 
K. = Kinloch, 1915, pp. 1038-41. 
K. & F. = Kisskalt and Friedmann, 1915, p. 397. 
N. = Nuttall, unpublished experiments conducted 1915-16. 
P. = Peacock, 1916, pp. 56, 55, 41 in sequence as quoted, corrected in MS. Report, 
W. 0. i. 1918. 
S. = Swellengrebel, 1916, p. 19. 
Experiments wherein corporis were brought in contact with 
various insecticides. 
(a) Experiments in vitro and in boxes. 
Note regarding methods. Castellani and Jackson (1915, pp. 253-255) 
in their experiments placed the lice together with the insecticide in 
glass vessels or tin boxes. Knaffl-Lenz (1915, p. 708) placed the lice 
on cloth impregnated with insecticide. Leitz (1916, p. 1538) experi¬ 
mented with nits placed on pasteboard moistened with insecticide. 
Galli-Valerio (1916, p. 41) does not describe his method and we assume 
it was similar to that of Castellani and Jackson for powders and to 
that of Knaffl-Lenz for fluids. Bacot (ix. 1916, pp. 447-450) experi¬ 
mented in a similar manner to Knaffl-Lenz; he does not state the time 
of exposure and adds that the results were negative. The authors 
