Word: carcinogens
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Dates: during 1959-1959
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...anti-cancer defenses break down is, in most cases, unknown. Many authorities accept the idea of some hereditary susceptibility. Sometimes there are easy, if superficial, explanations. The combination of a chemical carcinogen (cancer-causing factor) with physical irritation is plainly villainous. Cancer of the scrotum among London chimney sweeps was described by Percivall Pott in 1775. The disease disappeared when the sweeps were taught to wash themselves clean of the carcinogenic soot. Lung cancer from inhaling chromate-ore dusts and nickel-refining fumes can be prevented by the wearing of masks, coupled with adequate ventilation. Even the cancer-causing tobacco...