day perpetuate the worst traditions of the past, and they are counted by thousands. The Five Points had been cleansed, as far as the immediate neighborhood was concerned, but the Mulberry Street Bend was fast outdoing it in foulness not a stone's throw away, and new centres of corruption were continually springing up and getting the upper hand whenever vigilance was relaxed for ever so short a time. It is one of the curses of the tenement-house system that the worst houses exercise a levelling influence upon all the rest, just as one bad boy in a school-room will spoil the whole class. It is one of the ways the evil that was "the result of forgetfulness of the poor," as the Council of Hygiene mildly put it, has of avenging itself.
The determined effort to head it off by laying a strong hand upon the tenement builders that has been the chief business of the Health Board of recent years, dates from this period. The era of the air-shaft has not solved the problem of housing the poor, but it has made good use of limited opportunities. Over the new houses sanitary law exercises full control. But the old remain. They cannot be summarily torn down, though in extreme cases the authorities can order them cleared. The outrageous over-crowding, too, remains. It is characteristic of the tenements. Poverty, their badge and typical condition, invites—compels it. All efforts to abate it result only in temporary relief. As long as they exist it will exist with them. And the tenements will exist in New York forever.
To-day, what is a tenement? The law defines it as a house "occupied by three or more families, living independently and doing their cooking on the premises; or by more than two families on a floor, so living and cooking
