[35] Phelps and Stevenson, Hyg. Lab., U.S. Public Health Service, Bull. 96, 1914, p. 55.
[36] Harrington and Richardson, Manual of Practical Hygiene, 5th ed., p. 224.
[37] See Alice Hamilton, "Hygiene of the Painters' Trade," U.S. Bureau of Labor Statistics, Bull. 120, 1913.
[38] In 1909 the value of foods canned in the United States amounted to about $300,000,000 (U.S. Dept. of Agric., Bull. 196, 1915).
[39] W. D. Bigelow, Amer. Food Jour., XI (1916), 461.
[40] Arch. f. Hyg., XLV (1902), 88; ibid., LXIII (1907), 67.
[41] See, e.g., Harrington and Richardson, Practical Hygiene, 5th ed., p. 274.
[42] Ztschr. f. Hyg., LXXV-LXXVI (1913-14), 55.
[43] Bigelow, loc. cit.
[44] A. W. Bitting, U.S. Dept. of Agric., Bull. 196, 1915.