MALARIA EXPEDITION TO NIGERIA 
59 
Table IV, showing experimental inversion of filarial periodicity constructed 
from Manson's Chart. — No. of filariae in preparation under i x i^- inch cover glass. 
Dat^ 
A. 
M. 
P. 
M. 
2 
4 
6 
8 
10 
1 2 
2 
4 
6 
8 
1 0 
1 2 
9- xii - 79 ••• 
0 
58 
10 ,, 
63 
0 
0 
0 
62 
ii „ 
96 
6 
0 
0 
10 
30 
12 ,, 
155 
8 
0 
0 
S 
88 
13 » 
70 
6 
0 
0 
8 
26 
H » 
48 
7 
0 
0 
38 
115 
185 
1 2 
6 
0 
8 
12 
l6* 
52 
46 
8 
6 
8 
28 
17* » 
38 
8 
70 
[ 4 
6 
8 
6 
18* „ 
8 
48 
38 
60 
5 
5 
8 
•9 # » 
5 
74 
76 
50 
55 
5 
4 
6 
20* „ ... 
8 
38 
62 
52 
... 
10 
2 
8 
21* „ 
1 5 
42 
36 
34 
... 
1 1 
10 
1 1 
22* „ 
1 1 
28 
60 
46 
10 
6 
6 
23* ,, 
... 
15 
54 
48 
95 
8 
4 
H* » 
1 2 
2 I 
68 
86 
1 8 
8 
8 
2 5 ., 
9 
is 
We have had to construct this table from a chart in which the number of filariae 
were recorded by dots placed between horizontal lines, each representing ten filariae, 
and thus the numbers may not be exactly correct (within one to five units), owing to 
the difficulty of gauging the number represented by a dot placed between such lines. 
On days marked thus * the sleeping hours were from five a.m. to five p.m. On 
other days from six p.m. to six a.m. On December 14 the patient was not allowed to 
sleep. The experiment had been previously made by Mackenzie 1 with similar 
results. 
[. Mackenzie-, Trans. Path. Soc. of London, vol. xxxili, p. 400. 
