Dr. Playfair said previously, “The facts exhibited in the preceding sections, will, I apprehend, convincingly show, that a crowded and unhealthy district, with all its inevitable accompaniments of low morals and low intelligence--where the condition of human beings is scarcely above that of animals--where appetite and instinct occupy the place of the higher feelings--where the lowest means of support encourage the most improvident and early marriages,--is not the place where we shall find a diminishing or even stationary population. For the early unions there, are followed by early offspring; and although more than half that offspring may be swept away by disease during early infancy, yet nearly a third of it will grow up, in spite of all the surrounding evils, to follow in the steps of their parents, and in their turn to continue a race ignorant, miserable and immoral as themselves.” In a note, Dr. Playfair makes the following estimate. “If we suppose a district of 50,000 inhabitants, with births as 1 in 22, and deaths as 1 in 33--a ratio not actually as unfavorable as that of Holme--a little calculation will show that, by the end of twelve years, the population will have swollen it to nearly 60,000!” _Sameness of the Causes of Crime and of Disease._--Dr. Lyon Playfair, in the report already referred to, says expressly: “All the experience acquired during this inquiry, points out that one immediate effect of the operation of morbific causes, even when not present in sufficient intensity to produce direct disease, is to create an appetite for vicious indulgences. It is too common a mistake to transpose the effect for the cause, and to ascribe the disease to the indulgence of those passions, which, in the first place, were created by the low sanatory state of the district.” To the same purport are the pointed conclusions of Mr. Slaney. He had just been describing the low class of dwellings of the poor and the wretched, and the self-interest of small capitalists to prefer the erection of these to ones of a better description. He goes on to say: “I have endeavored to describe some of the evils arising from the want of proper sanatory regulations in many of these crowded and neglected places. They may be summed up as follows: “1st. Shortening the duration of the lives of the community. “2nd. Disease, suffering and inability to work on the part of many who survive--the cause of great cost to the country. “3d. Crimes, theft, and the loss of property, which the police constantly point out as arising from these neglected classes. “4th. Riots, disturbances and drunkenness, which may generally be traced to the same class of persons, often to the same place.