Gr. H. F. Nuttall 
495 
Ref. 
No. 
Insecticide 
used 
At °C. 
Stage 
tested 
n. = nits 
1. = lice 
+ -HO 
Result 
= killed in ' = mins. 
= some killed in 
- survived exposure of " = secs. 
Authority. 
Key to ref. 
at end of 
table 
10 
Carbolic acid, 2i % 
19° 
n. 
O 
5' —survived... 
N. 
11 
>> 99 
19° 
n. 
o 
5 ' 4 
10 ' f- killed 
N. 
12 
99 99 
19° 
n. 
+ 
N. 
13 
_ „ 3% 
Carbon bisulphide 
— 
n. 
± 
60' '? [not all killed]* ... 
H 
14 
21-5° 
n. 
O 
1 ' y survived ... 
N. 
15 
99 99 
21-5° 
n. 
O 
3' — „ . 
N. 
16 
99 9 9 
21-5° 
n. 
+ 
10 ' | killed . 
N. 
17 
Chloride of lime, 
7 %, cold 
1. n. 
+ 
24 hrs. Two infested shirts 
soaked, pieces bearing 50 
-100 nits cut out, rinsed 
and worn 13 days 
P. 
18 
Creolin, 3 % 
— 
n. 
+ 
25'. 
S. 
19 
Cresol, 14 %, cold 
1 . n. 
+ 
60' Six infested shirts 
soaked, afterwards pieces 
bearing 50-100 nits were 
cut out, rinsed and worn 
13 days 
P. 
20 f 
Cresol, 5 % , and 
soap 
- . 
n. 1. 
+ 
30'. 
N. 
21 
Cresol 
— 
n. 
o 
30'. 
K. & F. 
22 
Cyllin emulsion, 5% 
12-15° 
n. 1 . 
o 
30'. 
K. 
23 
Ether 
19° 
n. 
o 
10 ' -| survived ... 
N. 
24 
99 ••• • • • 
— 
n. 
o 
17' f „ . 
N. 
25 
99 ••• 
— 
n. 
± 
60' ^ „ 
S. 
26 
Lysol, 2 % 
21-5° 
n. 
+ 
5' f killed 
N. 
27 
28 
Mercurial ointment 
(white precip.) 
Oils (essential)i 
n. 
+ 
24 hrs . 
S. 
29 
Peru balsam, 30 % 
in alcohol 
— 
n. 
o 
2 hrs 
S. . 
30 
Petrol . 
— 
i. 
o 
30" . 
Hi. 
31 
9 9 • • • • • • 
— 
i. 
+ 
60" [doubtful] 
Hi. 
32 
99 ••• • • • 
19° 
n. 
o 
60" J survived. 
N. 
33 
99 • • • •• • 
19° 
n. 
o 
IV i „ . 
N. 
34 
99 • • • • • • 
19° 
n. 
o 
10 ' i „ . 
N. 
35 
99 ... ... 
— 
n. 
o 
5-25' survived, on shirt. 
Lice killed 
P. 
36 
Petrol and soft 
soap, equal parts, 
10 % emulsion 
n. 
+ 
14 hrs . 
S. 
37 
Petroleum 
— 
i. 
+ 
14' . 
Hi. 
38 
99 ... 
— 
i. 
± 
60" [some recovered 2 hrs 
later] 
Hi. 
39 
19° 
n. 
± 
20 ' 4 . 
N. 
40 
Petroleum, crude, 
0-75 % in soapy 
water 
32° 
i. 
± 
30' on 2 shirts, some sur¬ 
vived 7 days after, kept 
at 4-4° C. 
P. 
41 
Sublimate, 10 %... 
— 
n. 
+ 
3 hrs [no pract. import] 
S. 
* Doubtful if properly immersed. 
■f Add: 3—5 % Cresol soap solution kills n. and 1. in 1 hr, 1 % solution in 4 hrs; the 
soap per se exerts no influence (Hase 1916 a). 
J Kinloch (1915, pp. 1038-41) found that lice recovered from 1 minute’s immersion in 
oils of carraway, cinnamon, cloves, eucalyptus, peppermint, rue, tansy, thyme, turpentine 
and wintergreen. 
