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11
[1906
15 years of age and adding the result to the number of children under 5 years
This method is based on the fact that 51 per cent. of the children living in the
borough above five years, but under fifteen, are between the ages of five and
ten years; and, therefore, it is a fair inference that a similar proportion exists
throughout the various areas, with possible slight vaiiations.
"Now I have ascertained that 18 percent. of the tenements of the borough
containing less than five rooms are overcrowded, and I have consequently
made this figure the basis for classifying the degree of overcrowding which
obtains in each of the 271 enumeration areas which are set out in Table 6,
and I have used it in this way. Those areas in which the overcrowded
tenements are more than 25 per cent. below the average of the overcrowding
of the borough as a whole (18 per cent.) I have called Class I.; those which
are less than 25 per cent. below the average of the borough I have called
Class II.; those which are less than 25 per cent. above the average of the
borough I have called Class III.; while those which are more than 25 per
cent. above the average of the borough I have called Class IV. Let me
illustrate this by an example. In Table 6*, column 6, it is stated that 26.34
per cent. of the tenements under five rooms are overcrowded, then the
calculation is
18.0:26.34::100:146.3.
Consequently the crowded tenements are 46.3 per cent. above the average, and
therefore, the area would be included in class IV.
"From an analysis of the figures in column 6 of Table 7, I find that in
Upper Holloway 32 areas come under Class I., 2 under Class II., 8 under
Class III., and 15 under Class IV.
In Lower Holloway 5 areas come under Class I., 4 under Class II., 4
under Class III., and 19 under Class IV.
In Barnsbury 20 areas come under Class I., 7 under Class II., 10 under
Class III., and 17 under Class IV.
In Highbury 25 areas come under Class I., 5 under Class II., 2 under
Class III., and 2 under Class IV.
In Islington South East 29 areas come under Class I., 14 under Class II.,
9 under Class III., and 16 under Class IV.
* This Table is too lengthy to reproduce, but Aldermen and Councillors can obtain a copy of
it from the Medical Officer of Health.