The Diseases of Occupations

acid acute animals appeared became become blood body Brit Britain called carbon carbon tetrachloride carried cause cells cent century changes chemical chronic coal completely compounds concentration condition containing dangerous death described developed disease dust early effects employed engine especially examination experiments exposed exposure factory followed four fume give given hand handling hazard hospital important increased industry inhalation involved iron Italy known later lead lesions less light London lungs machine manufacture material measures mercury metal method miners mines months nature normal occupation occur operations organic oxide pain patient period persons plant poisoning possible powder prevent produced protection removed reported result seen severe showed signs silicosis skin sometimes substance suffered symptoms tion tissues toxic trade treatment usually ventilation weeks workers X-ray