The Diseases of Occupations

acid action acute alloys animals appeared arsenic became become blood calcium carbon carbon tetrachloride carried cause cells cent century changes chemical chloride coal colour completely compounds concentration containing dangerous death described developed disease dust early effects employed engineering examination experiments exposed exposure factory followed four fume give given handling hands hazard hospital important increased industry inspectors involving iron Italy known labour later lead lesions less liver London lungs manufacture material measures mercury metal method methyl miners mines months nature nickel normal occupation occur operations organic oxide pain patient period persons phosphorus plant poisoning possible prevent produced protection removed reported result seen severe showed signs skin slight sometimes steel substance symptoms tion toxic trade treatment usually vapour weeks workers