Mercury and its Compounds
[1] Laureck, Weyl’s Arbeiterkr., p. 62; [2] Giglioli, Ramazzini, 1909, vol. 3, p. 230.
Arsenic and its Compounds
[1] Zeitschr. f. Gew.-Hyg., 1902, p. 441; [2] Prölss, Friedreich’s Bl. f. ger. Med., 1901, p. 176.
Antimony
[1] Vergiftungen, vol. ii. p. 285.
Brass
[1] Vierteljahrsschr. f. ger. Med., 1906, p. 185; [2] Arch. f. Hyg., 1910, vol. 72, p. 358.