ment building, as in everything else, is toward concentration, and helps smooth the way. Four families on the floor, twenty in the house, is the rule of to-day. As the crowds increase, the need of guiding this drift into safe channels becomes more urgent. The larger the scale upon which the model tenement is planned, the more certain the promise of success. The utmost ingenuity cannot build a house for sixteen or twenty families on a lot 25 × 100 feet in the middle of a block like it, that shall give them the amount of air and sunlight to be had by the erection of a dozen or twenty houses on a common plan around a central yard. This was the view of the committee that awarded the prizes for the best plan for the conventional tenement, ten years ago. It coupled its verdict with the emphatic declaration that, in its view, it was "impossible to secure the requirements of physical and moral health within these narrow and arbitrary limits." Houses have been built since on better plans than any the committee saw, but its judgment stands unimpaired. A point, too, that is not to be overlooked, is the reduced cost of expert superintendence—the first condition of successful management—in the larger buildings.
The Improved Dwellings Association put up its block of thirteen houses in East Seventy-second Street nine years ago. Their cost, estimated at about $240,000 with the land, was increased to $285,000 by troubles with the contractor engaged to build them. Thus the Association's task did not begin under the happiest auspices. Unexpected expenses came to deplete its treasury. The neighborhood was new and not crowded at the start. No expense was spared, and the benefit of all the best and most recent experience in tenement building was given to the tenants. The families were provided with from two to
