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not a direct, but an indirect result of the high temperature,
the connecting link being an infection whose activity is in
some way dependent on the temperature and other conditions.
Age Incidence.—Of the 135 cases, 111 were under one year
of age, and 10 only over two years. Of these, 7 were persons
over 60 years of age. The greatest incidence was between
three and six months, and over half the deaths were between
three and nine months.
Information obtained in the enquiry showed that very
many non-fatal cases occurred both among infants and adults.
Dr. Ballard found in Dispensary practice that 15 per cent. of
the cases treated were children under one year, 32 per cent.
between one and five years, and 52 per cent. over five. It
appears then that this disease attacks a very considerable
portion of adults, but is in them seldom fatal. Dr. Ballard
found the incidence proportional to population to be greatest
between one and two years, and least between five and
twenty-five years.
Manner of Feeding.—Out of 128 cases, 7 had the breast
only, 5 the breast and other food; 99 were fed with the
bottle, and 17 by hand.
Of 16 children between 9 and 12 months, 14 were fed by
the bottle, 1 by the breast, and 1 by hand.
Of 4 children between 12 and 15 months, 3 were fed by
the bottle, and 1 by hand.
Of 3 children between 15 and 18 months, 1 was fed by
the bottle, and 2 by hand; and
Of 4 children over 18 months, all were fed by hand.
Thus 77 per cent. of the cases were bottle fed, and 23 per
cent. breast fed, or hand fed (including those self fed).