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The Importance of Colour Sense in Certain Occupations 14
Methods of Testing Colour Perception 23
45 other sections not shown
alveoli amongst amount appear asbestos asbestosis average award bacilli Belgian limestone blasting Broken Hill bronchi bronchioles cause cells cent Chairman Chamber of Mines chronic clinical coal Committee compensation Conference cubic cubic centimetre death definite detected diagnosis drilling employed employment evidence exhaust draught exposure factor fibrosis film flint free silica glands granite grinding increase Industrial Hygiene inhalation International Labour Office investigation Johannesburg konimeter large number lesions lung lymph lymphatics machine Medical Bureau methods miners mortality mottling natives Orenstein particles pathological period phagocytes Phthisis Phthisis Act Phthisis Medical pigmented pneumonoconiosis present primary produced pulmonary tuberculosis quartz radiographic radiological Rand regard Regulations Report respiratory rock samples sandstone secondary shadows showed silica dust silicosis and tuberculosis simple silicosis soot South Africa Springkell sputum stone stonemasons stopes Transvaal tubercular tuberculo-silicosis tuberculosis with silicosis tuberculous tuberculous infection underground ventilation Witwatersrand workers X-ray