Lest any undue importance should be ascribed to the influence of bad or inappropriate articles of diet in producing this large infant mortality, I may inform you that the rate of death is highest during that very early period of life when the child depends for nourishment on its mother; so that, of a thousand male children in the first year of life there die within the district of the City of London Union 242; within that of the East and West London Unions, 276.
The causes which thus decimate the young population of London are the common conditions of district unhealthiness--the conditions which it lies within the scope of sanitary legislation to amend. But, inasmuch as the few days of these wretched children are passed mainly within doors, so their high mortality constitutes the readiest and least fallacious evidence of the unwholesomeness of the dwellings in which they die: and hence I am acquainted with no correcter material for estimating the sanitary condition of a district than is afforded by the death-rate of its infant population.
Secondly, with regard to the alleged _particular causes of death_; I have extracted from our general registry, and have grouped in a separate table, those cases of death from acute disease which seem peculiarly due to physical causes affecting large numbers of persons.