WEEKS.
NEAR SNS
32
30
28
26
22
20
Percentage of
18
Infected
16
Rats on Total
11
caught.
12
10
S
6
28
26
21
22
20
18
16
Number of
Plagne Cases.
12
10
6
Curves of Rat and Human Plague. July 31st, 1903, to August 4th, 1904.
1903.
HEALTH DISTRICT II.
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 17 18 19 50 51 52 |
3 4
5 6 7
WEEKS.
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 19 50 51 52 |
2 3 4
1904.
X 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
M
Pu
μ
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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