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17
Taking the cases of Scarlet Fever there were 3.
The secondary disease notified in the instance of No.
7 was a different disease. This gives 1.58 per cent.
as return cases; of the three instances No. 1 barely
comes into the month.
No. 5.—Two cases were treated at home, the
third was removed to hospital, the fourth notified 10
days after the return of the third. It is difficult to
say if all the infected articles from the two cases
treated at home were disinfected.
No. 8.-During the time that the primary case
was in hospital the girl notified on September 18th had
been on the fence of the hospital every day and was
taken sick while at the fence.
Of Diphtheria in the instances of Nos. 3 and 6
the secondary disease was a different one; in the case
of No. 3 the child discharged on January 18th was
re-admitted on February 1st with Scarlet Fever and
Measles.
No. 2.—There were 17 days between the return
of the primary case and the notification of the second.
The period of incubation in this disease is not a fixed
period. Sir R. Thorne Thorne in his work on