“…IT HAS BEEN clearly established that skin cancer is one of the sequelae of exposure to arsenic, whether heavy environmental (Bergoglis, 1964;Yeh, 1973), industrial (Neubauer, 1947;Roth, 1956;Rockstoh, 1959) or medicinal (Hutchinson, 1888;Neubauer, 1947;Evans, 1976), and that lung cancer can be produced at high levels of airborne inorganic arsenicals, as in pesticide workers (Ott et al, 1974;Mabuchi et al, 1980), sheep-dip manufacturers (Hill & Fanning, 1948) and copper smelters (Lee & Fraumeni, 1969;Tokudome & Kuratsune, 1976;Axelson et al, 1978). The position about other cancers is less clear, and opinion ranges from the belief that arsenic has a carcinogenic effect on a wide range of internal organs (Dobson & Pinto, 1966;Regelson et al, 1968;Ott et al, 1974) to its having a protective effect (Frost,1.977).…”