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of the vaccinatum. This may be measured, as is frequently done,
by the number of marks, but it is more satisfactorily measured
by area of vaccination mark (i.e. area of cicatrix). The return
of the Metropolitan Asylumns Board respecting this point is
given here and a study of it will amply prove the claim made.
Admissions.
Deaths.
Mortality,
per cent.
Vaccinated Cases—
Area of Cicatrix—
Half and upwards of half
square inch 5,163 379 7.34
Area of Cicatrix—
One third but less than
half square inch 835 131 15.69
Area of Cicatrix—
Less than one third square
inch 860 162 16.87
Area of Cicatrix—
Not recorded 87 33 37.93
Totals of Vaccinated Class 6,945 705 10.15
Unknown and Doubtful Class 436 171 39.22
Unvaccinated Class 2,277 752 33.06
Grand Totals 9,658 1,628 16.87
CHICKEN-POX (Varicella).
At the beginning of January, 1902, the Borough Council
decided, on the recommendation of the Public Health Committee,
to make Chicken-pox a notifiable disease for six months (Public
Health (London) Act, 1891, Section 56) on account of the
similarity of the disease to Small-pox. Towards the end of the
same month the London County Council resolved to make
Chicken-pox notifiable for three months throughout London.
Hence the arrangements the Borough Council were making
became merged into the County Council's arrangements. Notification
commenced on February 7th, 1902. Subsequently, on