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province should be 75,000 per annum. But I do not expect that the maximum will
be constantly obtained in future years, for it never has been in years past. The area
of Sind, by recent returns obtained from the Revenue and Political Officers, is shown
to be 52,555 square miles ; and, taking its population at 2,500,000, it has an average of
47.5 persons to the square mile. The mass of the population, however, is located
within twenty miles of the river Indus, on both banks, so that the talookas at a
distance of more than twenty miles from the river are much less populous than the
average above mentioned : for instance, the Thur and Parkur Talookas contain about
15,000 square miles, and have only a population of about 200,000, or 13 persons to
the square mile : again, in Kohistan there are 2,693 square miles, and 2,645 inha-
bitants, or less than one person to the square mile : and in the Kurrachee Talooka, there
are 1,292 square miles, and, exclusive of Kurrachee town, only 7,199 inhabitants, or 5.5
to the square mile. If we exclude these very thinly populated parts from the averages,
the rest of Sind has about 70 persons to the square mile. To work steadily over the
province I have thirty Vaccinators ; they can go over it in about two years or there-
abouts. I do not think it would be advisable to go over even the more populous part,
oftener than every eighteen months, because, in such a thinly populated country, it
would, in many places, be difficult for Vaccinators to keep good lymph going, on
account of the number of vaccinated children being too limited to ensure always
vaccinating from good typical vesicles; I think, indeed, that two years is about
the space of time which should be allowed to elapse, at present, between the
visits of the Vaccinator. When the population shall have reached 4,000,000,
then it may become advisable to go over the more densely populated parts
of the province every year. It appears, then, that the annual births in the
talookas gone over by my Vaccinators may be estimated at about 66,666 ; but this
number is diminished by the unknown quantities,—(a), (b), (c), and (d),—and there
are no means of knowing exactly what these amount to, but I have roughly estimated
them at ten per cent., thus reducing the 66,666 to 60,000. I feel sure it would
be vain to expect the Vaccinators to reach the maximum yearly, but some years
they may obtain it, or even exceed it as they did in 1865 and 1866 ; but the chances
of the Vaccinators vaccinating the maximum is diminished with the diminished arrears
of unprotected persons in the province ; still, as the population is increasing, the actual
number of vaccinations should increase also. The next question which presents itself
for consideration, is, what relation should the number of Vaccinators bear to population
and area? In considering this question, the population part of it may be put on one
side, for no part of the province is yet so thickly populated as greatly to affect the
capacity of a Vaccinator to go over it in a reasonable time ; the question here is one
purely of how many square miles a Vaccinator can work over in about two years.
Sind, exclusive of the Khyrpoor State, contains fifty-three talookas, and, speaking
generally, one Vaccinator for every two talookas is sufficient; there is thus an average
of about 1,752 square miles for each Vaccinator to go over in two years, and the
average maximium work of each, if attained, should be about 2,000 vaccinations per