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The following table shows the mortality from phthisis in groups of London sanitary districts,
arranged in respect to the proportion of their population living more than two in a room in tenements
of less than five rooms.

Tables similar to the above have been published in several previous annual reports, and the
close relationship existing between "social condition" as measured by "overcrowding" and phthisis
mortality is conspicuous. It will be seen that in the group of most overcrowded districts the death
rate from phthisis is approximately twice that in the group least overcrowded.
For the purpose of comparison of the phthisis death-rate at ages, male and female, in relation
to social condition, as measured by the percentage of children scheduled for compulsory education2, the
figures in the following table have been calculated on the deaths for the three years 1906-8.
Deaths occurring in institutions of persons whose last known address was a common lodging-house
have been excluded. Diagram XXII. is based on these figures.

1 See footnotes (2) page 6 and (2) page 25.
2 See heading to diagram IV.