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deaths. The accompanying chart shows clearly the
influence of the time of year on the behaviour of this
disease:-
During the hot weather, milk, which, in its various
forms, is the chief food of infants and young children,
becomes a yet more suitable vehicle than usual for
the growth of micro-organisms, and, as I have before
pointed out, it is also at this time more liable to be
contaminated by certain germs of disease, which,
during these months probably reach the height of their
virulence, and are carried in the atmosphere by particles
of the powdered filth of all sorts in which they
originally existed, and so gain access to the milk. This
condition of things can and should be guarded against,
and it is by the spread of knowledge on this and