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To the Editor:
—In the editorial on anthracosis and silicosis in relation to pulmonary tuberculosis (The Journal, November 5), attention is called to the fact that the death rate shown for the group of miners and quarrymen was second to the lowest rate, but that it was believed on good grounds that, had the occupations been separated, that for the miners would have been lower. I believe this to be correct.Again, the United States census is quoted as showing that the group "marble and stone cutters, in whom the dust inhaled also has a high silica content, comprised the occupational group with the highest mortality from tuberculosis."The latter is even more misleading than the first. This group, I believe, should show the rate for marble and limestone workers separately. Marble and limestone have been shown to contain a minimum of silica and are relatively innocuous, and if grouped
Perry CE. ANTHRACOSIS AND SILICOSIS IN PULMONARY TUBERCULOSIS. JAMA. 1927;89(26):2211. doi:10.1001/jama.1927.02690260059027