-----------------------------+-------------+--------------- | Negro | Per cent of Assembly District. | population. | total. -----------------------------+-------------+--------------- 5th Assembly District | 1,378 | 3.8 9th Assembly District | 1,673 | 4.6 11th Assembly District | 3,756 | 10.4 13th Assembly District | 2,584 | 7.1 17th Assembly District | 1,214 | 3.4 19th Assembly District | 4,982 | 13.8 21st Assembly District | 1,135 | 3.1 23rd Assembly District | 3,169 | 8.7 25th Assembly District | 2,950 | 8.1 27th Assembly District | 3,318 | 9.2 31st Assembly District | 1,483 | 4.1 32nd Assembly District | 1,680 | 4.6 All other Districts | 6,924 | 19.1 -----------------------------+-------------+-------------- Total | 36,246 | 100. -----------------------------+-------------+--------------- The exact character and extent of the segregation of the Negro population may be clearly seen from diagrams of this Harlem district, and of the "San Juan Hill" district in the West Sixties, based upon the latest figures of the Census of 1910. This is given in Diagrams III and IV (pp. 50-51)[42] With such a distribution of the clearly segregated Negro population, the representative character of the 2,500 families chosen for closer study becomes evident. These families, from figures based upon the original returns of the New York State Census of 1905, were chosen from the Eleventh, the Nineteenth, the Twenty-third, and the Thirty-first districts. The last district was taken in preference to several which contained larger numbers, because it included certain streets that were typical of the Harlem section. [Illustration: Diagram III: DISTRIBUTION OF THE NEGRO POPULATION OF HARLEM Corrected To June 1911] [Illustration: Diagram IV: DISTRIBUTION OF THE NEGRO POPULATION ON "SAN JUAN HILL"] In all 2,639 families were tabulated. Of these 95 were excluded because the heads of these families were of the professional or business classes, 37 because they were too incompletely reported, and 7 because the heads were white. This reduced the number to 2,500 families, which consisted of 9,788 persons, exclusive of 17 white members of these families. The data from the State Census schedules of enumerators were tabulated in regular order as reported by them for each block or part of block for the Negro families that were designated as living in that street or block.