[22] M. G. Mulhall, F. S. S., in North American Review, July, 1897.
[23] Tenth Census, Vol. XI, p. xxxviii.
[24] Dr. John S. Billings’ comments upon Vital Statistics of the Tenth Census, Vol. XI, p. xxxviii.
[25] Pages 53 and 54.
[26] Report of the Health Officer of the District of Columbia, 1896, page 7.
[27] Pages 53 and 55.
[28] Bulletin of the Department of Labor, No. 10, May, 1897, page 286.
[29] Surgeon General’s Report, 1896, Table XII.
[30] Dr. Francis A. Walker, in the Forum, July, 1891.
[31] Page 148.