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that there was some local influence at work. In that particular
group of houses in which most of the cases occurred the drains
were thoroughly tested with the smoke test, and also opened up
and examined, but no serious defect was found, except that the
ventilation was, in my opinion, insufficient. The cases ceased as
quickly as they came and all recovered.
I append a list of the cases shewing the different localities
in which they occurred.
All the defects in the sewers and drains were remedied, and
further ventilation shafts are to be provided in that locality
therefore.