21
EVACUATION.]
4. Kthiawr.
Villages evacuated = 3
Villages not evacuated = 3
(c) Aggregate duration = 16 weeks.
(d) Aggregate duration = 35 weeks.
Average duration = 5 1/3 weeks.
Average duration = 11 2/3 weeks.
5. Ratngiri.
Villages evacuated = 3
Villages not evacuated = 1
(c) Aggregate duration = 19 weeks.
(d) Aggregate duration = 9 weeks.
Average duration = 61/3 weeks.
Average duration = 9 weeks.
6. Surat.

Villages evacuated = 23
Villages not evacuated = 16
(c) Aggregate duration = 133 weeks.
(d) Aggregate duration = 183 weeks.
Average duration = 5 1/3 8/3 weeks.
Average duration = 11 7/16 weeks.
7. Thna.

Villages evacuated = 20
Villages not evacuated = 22
(c) Aggregate duration = 123 weeks.
(d) Aggregate duration = 236 weeks.
Average duration = 6 3/20 weeks.
Average duration = 10 8/11 weeks.
The general result, as shown by these 8 Districts, is as follows : -
Evacuated Villages.
Non-evacuated Villages.
Total aggregate duration = 531 weeks.
Total aggregate duration = 1,078 weeks.
(c) Number of villages = 94
(d) Number of villages = 97
Average duration
Average duration
Per village = about 5 1/2 weeks.
Per village = about 11 weeks.

Or, in other words, in villages with a population of from 100 to 7,000, evacuation shortens the
duration of an epidemic by one-half.
The following interesting table of the effect of evacuation on the duration of epidemic
in the villages of Palnpur State is given by Lt. Rainier, I. M, S. :-

Population.
Cases.
Deaths.
Mortality
per cent.
of cases.
Case incidence per mille.
Average duration (first to last case in days).
Number of Villages.
Palnpur
Town
21,092
674
413
61.2
31.9
15.3
1
Total villages, ex-
cluding Palnpur.
57,934
953
656
66.8
15.5
31.3
53
Villages not imme-
diately evacuated.
36,301
616
454
73.7
1.60
46.6
22
Villages immediately
evacuated
2,1633
337
202
59.9
15.0
14.1
31
As regards-
(iv.) Evacuation tends to arrest the disease in toto in villages when carried out at once.
The following instances, where 120 case was reported subsequent to the completion of
evacuation, may be quoted. There are others, but the details are not to hand :-
6