I infer, then, that in our model city certain forms of disease would
find no possible home, or, at the worst, a home so transient as not
to affect the mortality in any serious degree. The infantile diseases,
infantile and remittent fevers, convulsions, diarrhoea, croup,
marasmus, dysentery, would, I calculate, be almost unknown. Typhus
and typhoid fevers and cholera could not, I believe, exist in the
city except temporarily, and by pure accident; small-pox would be
kept under entire control; puerperal fever and hospital fever would,
probably, cease altogether; rheumatic fever, induced by residence
in damp houses, and the heart disease subsequent upon it, would
be removed. Death from privation and from purpura and scurvy would
certainly cease. Delirium tremens, liver disease, alcoholic phthisis,
alcoholic degeneration of kidney and all the varied forms of
paralysis, insanity, and other affections due to alcohol, would
be completely effaced. The parasitic diseases arising from the
introduction into the body, through food, of the larvae of the
entozoa, would cease. That large class of deaths from pulmonary
consumption, induced in less favoured cities by exposure to impure
air and badly ventilated rooms, would, I believe, be reduced so as to
bring down the mortality of this signally fatal malady one third at
least.

Some diseases, pre-eminently those which arise from uncontrollable
causes, from sudden fluctuations of temperature, electrical storms,
and similar great variations of nature, would remain as active as
ever; and pneumonia, bronchitis, congestion of the lungs, and summer
cholera, would still hold their sway. Cancer, also, and allied
constitutional diseases of strong hereditary character, would yet, as
far as I can see, prevail. I fear, moreover, it must be admitted that