The Japanese population by sex in 1920 is male 44,364, female 25,832; for 1910, male 35,116, female 6,240; and for 1900, male 9,598, female 553. The per cent. distribution by sex of the Japanese in 1920 is male 63.2 per cent., female 36.8 per cent.; for 1910 male 84.9 per cent., female 15.1 per cent.; and for 1900, male 94.6 per cent., female 5.4 per cent. [24] Gulick, S. L., _Japan and the Gentlemen's Agreement_, 1920, p. 7. [25] _World Almanac 1921_, p. 476-9. [26] _World Almanac 1920_, p. 487. [27] The birth rate of immigration population in Massachusetts was 49.1 in 1910. [28] _Senate Document_, vol. lxv., 61st Congress. [29] _Senate Document_, vol. lxv., 61st Congress. [30] Of the forty-one answers to the questionnaires sent to the County Farm Commissioners in California by the Board of Control asking them to give pertinent facts concerning the methods used by these races (Orientals) in securing land leases, twenty-five stated: "The Japanese pay more rent in cash or shares"; ten said: "Japanese pay ordinary rent" or "use ordinary means in obtaining lease." _California and the Oriental_, pp. 56-61. [31] _The Japanese Problem in the United States_, pp. 148-49. [32] _California and the Oriental_, pp. 56-61. [33] _Ibid._, p. 221. [34] _California and the Oriental_, p. 58. [35] _Immigration Commission Reports_, vol. xxiii., chap. iv. [36] _Japanese-American Year Book_, 1918, p. 10. [37] _The Japanese Problem in the United States_, p. 123. [38] For detailed comparison of crops raised by white and Japanese farmers see Appendix E. [39] Figures taken from _California and the Oriental_, p. 47. [40] See Appendix B. [41] For full texts of land laws 1913 and 1920 see Appendixes C and D. [42] _California and the Oriental_, p. 104. [43] Mr. Newman in the hearings held at Sacramento, California, in 1913. [44] Millis' _The Japanese Problem in the United States_, p. 275. [45] Gulick, S. L., _The American Japanese Problem_, p. 153. [46] Jones and East, _Inbreeding and Outbreeding--Their Genetic and Sociological Significance_, p. 255. [47] W. E. Castle, _Genetics and Eugenics_, pp. 233-38. [48] _California and the Oriental_, p. 15. [49] "Changes in Bodily Form of Descendants of Immigrants." _Senate Document No. 208_, pp. 7-54. [50] _The Jews: A Study of Race and Environment._ [51] See Appendix A. [52] _The Forum_, January, 1921, p. 3. [53] For this as well as other information the authors are indebted to Mr. S. Kusama, who furnished us with the materials which were carefully prepared by him from first-hand research in California. [54] _Bureau of Census Bulletin 127_, p. 12. [55] _Race and Nationality_, Frederick A. Stokes Co., New York, 1919. [56] See example of testimony in Appendix L. See also Appendix M in which the subject of comparative standing of intelligence and behaviour of native-born Japanese children and American children is discussed by several principals of elementary schools in Southern California.