Curves of rat and human Plague.-July 31st, 1903, to August 4th, 1904.
THE CITY OF VICTORIA.
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 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
}
WEEKS.
( 12
11
10
9
Percentage of
Infected
Rats on Total
caught.
40
38
WEEKS.
П
Д.
По
| 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 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
36
34
32
30
28
26
24
Number of
22
20
Plague cases.
18
16
14
12
10
8