[54] H. L. Russell, Dairy Bacteriology, p. 46.

[55] Bureau of Animal Industry Reports, 1895–1896.

[56] British Medical Journal, 1895, vol. ii., p. 322.

[57] British Medical Journal, 1895, vol. ii., p. 322.

[58] Journal of Comparative Pathology, vol. x. (1897), pp. 150–189.

[59] E. W. Hope, M.D., D.Sc., Report of the Health of Liverpool during 1897, p. 40.

[60] S. Rideal and A. G. R. Foulerton conclude, from a series of experiments, that boric acid (1–2,000) and formaldehyde (1–50,000) are effective preservatives for milk for a period of twenty-four hours, and that these quantities have no appreciable effect upon digestion or the digestibility of foods preserved by them (Public Health, May, 1899, pp. 554–568).

[61] Report from Wisconsin Agricultural Experiment Station, 1896.

[62] Jenner Institute of Preventive Medicine (First Series Transactions).

[63] Centralblatt für Bakteriologie, etc., II. Abteilung.