504 
Combating Lo usiness 
Kef. 
No. 
Vapour or gas tested 
At ° C. 
Stage 
tested 
n. =nits 
1. =lice 
+ 
± 
0 
Result 
=killed in ' = mins. 
= some killed in "=secs. 
= survived exposure of 
Authority. 
See key to 
refs, at end 
of table 
178 
Naphtiiol 
_ 
_ 
n. 
0 
5 days (2 nits tested) 
W. 
17a 
a-Naphthol 
Oils (essential) 
n. 
0 
5 days (3 nits tested) 
180 
,, anise 
— 
— 
1 . 
+ 
24 hrs 
It. 
181 
„ bergamot 
— 
— 
1 . 
+ 
24 hrs 
55 
182 
„ caraway 
— 
— 
1 . 
0 
some hrs 
K. 1 
183 
— 
— 
1 . 
+ 
24 hrs 
11. 
184 
,, cinnamon 
— 
— 
1 . 
0 
some hrs 
K. 1 
185 
— 
— 
1 . 
+ 
24 hrs 
R. 
186 
„ cloves 
1/20 c.c. per 2 L. space 
16° 
1 . 
+ 
6 hrs, immobilized and 
100 % killed 
h. 
187 
55 11 
11 11 
33° 
1 . 
± 
If hrs, immobilized 
and 80 % survived 
55 
188 
— 
— 
1 . 
0 
some hrs 
K. 1 
189 
„ eucalyptus 
1/20 c.c. per 2 L. space 
16° 
1 . 
± 
2 hrs, immobilized and 
40 % survived 
L. 
190 
55 55 
11 11 
33° 
1 . 
± 
l hr, immobilized and 
20 % survived 
55 
101 
5 5 55 
1 . 
+ 
2-18 hrs (vapour filter¬ 
ed through cloth; in 
tube) 
S. & F. 
192 
55 5 5 
l.- 
4- 
? hrs (cloth saturated 
and placed 4 days in 
open at 15° C.; in tube) 
55 
193 
— 
— 
1 . 
0 
some hrs 
K. 1 
194 
— 
— 
1 . 
4- 
24 hrs 
R. 
195 
— 
— 
n. 
O 
24 hrs 
H. 2 
196 
,, fennel 
16 drops in 1500 c.c. space 
— 
1 . 
4- 
? 1 hr 
Wu. 
197 
— 
— 
n. 
O 
1 hr 
198 
— 
— 
1 . 
4- 
24 hrs 
R. 
199 
,, lavender 
— 
— 
1 . 
4- 
24 hrs 
200 
,, lemongrass 
1/20 c.c. per 2 L. space 
16° 
1 . 
-JZ 
1 hr, immobilized, 20% 
survived 
I.. 
201 
55 55 
55 11 
33° 
1 . 
+ 
35', immobilized, 100% 
killed 
” 
202 
„ peppermint 
55 11 
16° 
1 . 
i 
45', immobilized, 40 % 
survived 
5 ’ 
203 
55 55 
11 11 
33° 
1 . 
4 - 
35', immobilized, 100% 
killed 
55 
204 
— 
— 
1 . 
0 
some hrs 
K. 1 
205 
„ rue 
— 
— 
1 . 
0 
some hrs 
206 
„ sage 
1/20 c.c. per 2 L. space 
16° 
1 . 
± 
2 hrs, immobilized, 
80 % survived 
I.. 
207 
55 5 » 
11 55 
33° 
i. 
± 
45', immobilized, 40 % 
survived 
55 
208 
» tansy 
— 
— 
1 . 
0 
some hrs 
If. 1 
209 
„ thyme 
— 
— 
1 . 
0 
some hrs 
55 
210 
,, turpentine 
— 
— 
1 . 
0 
some hrs 
,, 
211 
— 
— 
1 . 
*T" 
24 hrs 
R. 
212 
— 
— 
n. 
0 
5 days 
Zu 2 
213 
5 5 # 55 
„ wintergreen 
— 
— 
n. 
0 
6 days (3 nits tested) 
W. 
214 
— 
— 
1 . 
0 
some hrs 
If. 1 
215 
,, wormwood 
— 
— 
1 . 
4- 
24 hrs 
R. 
216 
Paraffin [liq .] 
— 
— 
n. 
O 
3 hrs 
Zu. 2 
217 
Petrol 
saturated atmos. 
15° 
n. 
O 
5', 5/5 nits survived 
N. 
218 
Petroleum 
15° 
n. 
O 
15', 4/4 nits survived 
,, 
219 
55 
Phenol 
— 
1. 
4- 
24 hrs 
R. 
220 
— 
— 
n. 
O 
11- hrs 
Zu. 2 
221 
Pyre th nim 
— 
— 
1 . 
O 
1 hr 
J. 
222 
Sabadilla (alcohol, extr.) — 
— 
1 . 
O 
some days 
Zu. 1 
223 
Safrol 
1 drop at dist. of 6-5 
cm. in tube 
1 . 
+ 
2 hrs 
Fr. 
