APPENDIX   No. 9.
EXPLANATION OF MAPS AND CHART.
MAP No. 1.
Map No. 1 shows the sub-division of the Island into Wards and Sections,
and in the marginal squares, the names of the officers in charge of
the same.
The colouring on the plan of the wards, agrees with the marginal squares, and
within the squares are given the names of the Sections, the population, and the
number of houses in each Section.
A Plague Committee Hospital is shewn by a circle coloured yellow, with a
number in the centre of it. On a reference to the index at the side of the map, the
name of the Hospital referred to is given. The Committee's Health Camps are
shewn by a red circle, with a number. A similar index at the side of the map
gives the name of the Camp.
The small pink squares with numbers, indicate the position of the Private Hos-
pitals, and the index at the side of the map gives the names and the Sections in
which the Hospitals are situated.
MAP No. 2.
Explanation
of Map.
Map No. 2 is  an epidemic map of the disease, showing its course from
September 1897 to the end of March 1898.
Primary    Co-
lours.
The primary colours have been made use of in this plan in their regular order,
as shown by the large coloured circles in the margin, month by month, and this has
been continued after the 7th month by using the colours again and hachuring the
circle.
In the margin are also shown all the Census Sections of the city.
Sections.
Each Section, as it became epidemic, was coloured with the colour distinguishing
the month in which the disease arrived at the epidemic stage, and under each
marginal Section heading is shown the number of cases taking place monthly in
that Section, after the disease had become epidemic.
Epidemic.
In deciding on the epidemic state of a Section, great care was taken to carefully
watch the distribution of the cases throughout the Section, and this was done
in many instances by plotting on a plan the actual cases from house to house. It
has often occurred in this city that Plague has raged in an epidemic form in small
and confined areas, especially those inhabited by Kolis (fishermen), while beyond
such areas it has only appeared in a sporadic form. In such cases the whole Section
was not considered epidemic. Previous to, and after the epidemic period, cases
appertaining to the month in which they occurred are shown by coloured circles
placed in the Section, according to the monthly colour; the number of cases shown
in the circles indicates the number occurring in that month.