The families studied were from the following territory: Within the Eleventh Assembly District, the area bounded by Thirtieth and Thirty-eighth streets, Seventh and Tenth avenues; within the Nineteenth Assembly District, Sixty-first, Sixty-second, and Sixty-third streets, between Amsterdam and Eleventh avenues, commonly called "San Juan Hill;" within the Twenty-third and Thirty-first Assembly Districts, One Hundred and Thirtieth and One Hundred and Thirty-third streets between Eighth and St. Nicholas avenues, and One Hundred and Thirty-fourth and One Hundred and Thirty-fifth streets between Fifth and Seventh avenues. These three segregated neighborhoods in 1905 may be roughly characterized as follows: The first was probably in the lowest grade of social condition; the second did not show a decidedly predominant type, but ranged from the middle grade toward the more advanced; the third was the most advanced. A comparison in detail of the distribution by assembly districts of the total Negro population and of the 2,500 selected families shows also that the latter are representative of the several neighborhoods and of the total population. Table X shows the distribution by Assembly Districts of the 2,500 families for comparison with Table IX above, which gave the total Negro population of Manhattan and its distribution. TABLE X. DISTRIBUTION BY ASSEMBLY DISTRICTS OF 2,500 NEGRO FAMILIES, STATE CENSUS, 1905. --------------------+------------------+------------------ Assembly District. | No. of families. | No. of persons. --------------------+------------------+------------------ Eleventh | 927 | 3,329 Nineteenth | 1,018 | 4,024 Twenty-third | 326 | 1,581 Thirty-first | 229 | 854 --------------------+------------------+------------------ Total | 2,500 | 9,788 --------------------+------------------+------------------ In addition to the data of the State Census of 1905, a personal canvass was made in 1909 of 73 families in their homes, having a total of 212 persons. To these were added 153 individuals at one of the evening schools of the city, a total of 365 persons. The localities within which these 365 people lived corresponded in the main to the location of the 2,500 families taken from the State Census of 1905; that is, between Twenty-fifth, Forty-fifth streets, Fifth and Eighth Avenues; Fifty-third, Sixty-fifth streets, west of Sixth Avenue and between One Hundred and Thirtieth and One Hundred and Thirty-sixth streets, Fifth and Seventh Avenues.