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 do with the structure and repair of individual houses. Dilapidated houses, houses that are not rain-proof, houses in which the sanitary arrangements are inadequate, houses so made that there is no proper means of ventilation—the building of these must be forbidden by law, and, if they have been built already, they must, through law, be either renovated or destroyed. The second element has to do with the overcrowding of rooms. To prevent this, also, whether the threatened overcrowding be due to too large a family or to too small a house, or to the taking in of lodgers, direct legislation is necessary. In Mr. Syke's words, what is required "can only be done on a sufficient scale by a statutory definition of overcrowding of cubic space"; and he adds, giving his own view of what this definition should be, "nothing short of 400 cubic feet per head for adults will be satisfactory, although it may reluctantly be reduced to half the amount for children under ten years." A policy on these general