Gr. H. F. Nuttall 
497 
cited in the table do not record the temperature at which their obser¬ 
vations were made. 
N.B. In many contact experiments with volatile substances vapour 
action necessarily takes place. 
Eef. 
No. 
Insecticide 
tested 
Stage 
tested 
n. = nits 
1 . = lice 
Result 
+ = killed in 
± = some killed in 
o = survived exposure of 
Authority 
53 
Alcohol, absolute 
n. 
o 
2 lirs 
S. 
54 
Anisol, 5 %* . 
11 • •• »• • 
n. 
o 
2 hrs 
s. 
55 
i. 
o 
10 hrs ... 
Kn. 
56 
Antiformin, 10 % 
i. 
+ 
20 ' . 
S. 
57 
11 11 
n. 
o 
10 ' . 
s. 
58 
Arsenious acid, powder 
i. 
o 
24 hrs ... 
C. 
59 
Boric acid, powder 
i. 
o 
7 days ... 
C. 
60 
Calomel 
i. 
o 
48 hrs ... 
C. 
61 
Camphor, powder 
i. 
o 
some hrs 
G. 
62 
Carbolineum, concen.tr. 
n. 
-j- 
4 hr [few nits tested] ... 
s. 
63 
Cineol * 
i. 
+ 
4-6 hrs ... 
Kn. 
64 
Chinosol, powder 
i. 
o 
some hrs 
G. 
65 
Cresol, 3 % powder ... 
n 
o 
12 hrs ... 
W. 
66 
,, 5 % soap sol. ... 
n. 
+ 
4 hr [few nits tested] ... 
8 . 
67 
Ether ... . 
n. 
o 
15' [nits moistened] ... 
W. 
68 
Iodoform 
i. 
-f 
12 hrs [lice buried in it] 
K. 
69 
Methylated spirit 
n. 1. 
+ 
1 hr 5'. 
S. 
70 
Naphthaline 
I. 
± 
8-10 hrs 
Kn. 
71 
,. powder ... 
1. 
o 
some hrs 
G. 
72 
Perolin * 
1. 
- 1 - 
20-25' [contact essential] 
Kn. 
73 
Pvrethrum, powder ... 
1. 
o 
several days [lice with powder 
in bos] 
Kis. 
74 
I. 
o 
some hrs 
G. 
75 
Salicylic acid, powder... 
1. 
o 
20 hrs ... 
C. 
76 
Sublimate, dry... 
1. 
o 
24 hrs ... 
C. 
77 
,, 1 : 1000 sol. 
n. 1. 
o 
2 hrs 
8. 
78 
• 1. 
+ 
8 hrs . 
G. 
79 
Sulphur, powder 
1. 
o 
48 hrs. 
C. 
80 
Xylol . 
n. 
o 
15' [nits moistened] ... 
W. 
81 
Cresol, 5-7-5 % 
i. 
o 
Pieces of blanket sprayed with 
cold solution (2 pints per blan¬ 
ket) and rolled up. Lice alive 
after 3 days. (Costly!) 
P. 
82 
» io % . 
i. 
+ 
Ditto. Lice dead after 1 day 
P. 
* Commercial preparations. Anisol =Methylphenylether. 
References to authors. 
C. = Castellani and Jackson, 1915, pp. 253-5. 
G. = Galli-Valerio, 1916, p. 41. 
K. = Kinloch, 1916, p. 790. 
Kis. = Kisskalt, n. 1915, p. 154. 
Kn. = v. Knaffl-Lenz, 1915, p. 708. 
P. = Peacock (MS. Report, W. 0. i. 1918). 
S. = Seitz, 1916, p. 1538. 
W. = Widmann, m 1915, pp. 289-298. 
