[31] King, W. I., Employment, Hours and Earnings in the United States, 1920-1922, Chap. V, pp. 5, 19; Chap. IV, p. 3.
[32] Salmon, Lucy M., op. cit.
[33] Monthly Labor Review, U. S. Bureau of Labor Statistics, August, 1920, p. 212.
[34] Eaton, Isabel, op. cit., p. 495.
[35] Reed, Ruth, op. cit., p. 35.
[36] Haynes, George E., unpublished data, 1921.
[37] Martin, Asa E., Our Negro Population, Kansas City, 1913, pp. 180, 143.
[38] Haynes, Geo. E., unpublished data, 1921.
[39] Reed, Ruth, op. cit., p. 51.
[40] Rubinow, I. M., Depth and Breadth of the Servant Problem, McClure's Magazine, Vol. 34, p. 576, 1909-1910