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    We may now compare the results of the investigations in Ulloobari and Old
Salonah villages thus :—

Place. Prevalence of
kala azar.
Spleen-rate per
cent. of children.
Malarial
endemic index.
Species of malarial
parasites present.
Ulloobari 17 per cent. of the in-
habitants examined
were suffering from
this disease.
32.5 12.5 Quartan and Simple
Tertian parasites.
Old Salonah Nil 84 80 Quartan, Simple
Tertian and Malig-
nant Tertian para-
sites.

    In case any doubt as to the correctness of my argument still remains, I shall
now compare the relative prevalence of kala azar and of malarial fever in two
villages which, being inhabited by the same class of people and being situated
only a short distance apart, are under similar conditions. For this purpose
I shall select the villages of Old Salonah and New Salonah, both situated on the
Salonah tea estate near Nowgong. The results of my investigation in Old
Salonah village have already been given. New Salonah village contained, at the
time of my visit, about 450 inhabitants, and careful inspections showed that there
were 12 advanced cases of kala azar among these people. The disease was
endemic in the village and new cases frequently occurred.

    The prevalence of malaria is shown by the results of my examination of
children as follows :—

No Age. Condition of spleen. Result of examination of slides of
finger blood.
1 3 years Enlarged. Positive. Quartan parasites.
2 6 " Not enlarged Negative.
3 4 " Enlarged Positive. Quartan and Simple Tertian
parasites.
4 3 " Ditto Positive. Quartan parasites.
5 2 Ditto Negative.
6 3 " Ditto Positive. Simple Tertian parasites.
7 8 " Not enlarged. Negative.
8 5 " Ditto Ditto.
9 2 " Enlarged Positive. Simple Tertian parasites.
10 4 Ditto Ditto. Ditto.
11 1 year Ditto Negative.
12 1 " Not enlarged. Ditto.
13 1 " Enlarged Positive. Simple Tertian parasites.
14 2 years Ditto Ditto. Ditto.
15 3 " Not enlarged Negative.
16 1 year Ditto Ditto.
17 8 months Enlarged Positive. Simple Tertian parasites.
18 3 years Ditto Ditto. Ditto.
19 8 months Ditto Positive. Pigmented leucocytes.
20 2 years No enlargement detected Positive. Simple Tertian parasites.
21 3 " Enlarged Positive. Quartan parasites.
22 2 " Ditto Ditto. Ditto.
23 1 year Ditto. Positive. Simple Tertian parasites.

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