Continued exposure might lead to the development of other conditions,
which, in their turn, might lead to disease or death.
From this point the President proceeded to speak of the increased
toxical power of volatile compounds given off by neglected decomposed
matter, and was thence led to dwell upon the dangers arising from
decomposed substances in cesspools and in badly constructed drains.
There was no doubt, he said, that in the sewering of towns want of
experience in the construction of works had in some cases led to
deposits in the sewers, and evil consequences had ensued; but it might
be accepted as certain that in every case where the sewerage had been
devised on sound principles, and where the works had been carried
on under intelligent supervision, a largely reduced death-rate had
invariably followed.
Evidence of this fact he adduced from the history of Newcastle, for in
the ten years beginning in 1867 the death-rate was 27.6, while in the
ten years ending 1881 (during which there had been improved sewerage in
operation) the death-rate was only 23, while in 1881 it was only
21.7. He instanced the like results in Munich, where the entire fever
mortality sank from 24.
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