The average number of persons per room in the households studied was as follows: native-born white of native father, .93; native-born of foreign father, 1.01; foreign-born, 1.42 (p. 24). Only 51.9 per cent of the native-born white of native father had one or more persons per room, 54.7 per cent of the German households, 68.5 per cent of the Irish, south Italians 91.9 per cent, and Greeks 98 per cent. Of the Slovaks, Slovenians, and Syrians, 90 per cent or more of the households had one or more persons per room. Two per cent of the Greeks, 2.6 per cent of the south Italians, and 3 per cent of the Syrians had four or more persons per room. The number of occupants, per _sleeping_ room, is of course somewhat higher. The total average number of persons per sleeping room in the households whose heads were native-born white of native father was 1.93; of the foreign-born, 2.39. Two per cent of the Greek households studied had six or more persons per sleeping room, as did 2 per cent of the south Italians and 5.2 per cent of the Slovenians. Fourteen per cent of all the foreign-born households slept in all the rooms in their apartments, and 41.1 per cent in all the rooms except one, while among the native-born whites of native fathers 2.3 per cent slept in all the rooms, and 20.2 per cent in all the rooms but one. The foregoing figures may be taken as giving a reliable summary of the amount of congestion in the crowded districts of the seven great cities mentioned. It is painfully evident that conditions exist on a wide scale in these centers, which are a disgrace to any civilized country. A large proportion of the lower classes of our cities are living under conditions which render self-respect, cleanliness, and even decency almost impossible. Moreover, it is apparent that the native-born whites of native fathers, studied in this investigation, although representing the lowest portions of that class, rank decidedly above the foreign-born as far as can be judged by the degree of congestion. The native-born of foreign fathers stand between the other two classes. A more vivid and vital aspect may be given to the picture by taking some specific instances of life conditions among various groups of the foreign-born.