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Footnotes
The article was originally accompanied by 11 large tables giving the findings of this study in full. At the request of the Editor the number of tables has been reduced in order to save space.
Contributor Information
P. K. Sen, Junior Visiting Physician, Chest Department, Medical College Hospitals, Calcutta (From the Department of Chest Diseases, Medical College Hospitals, Calcutta, and Clinic No. III, Bengal Tuberculosis Association)
C. Chandra Sekar, Assistant Professor of Vital Statistics and Epidemiology, All-India Institute of Hygiene and Public Health (From the Department of Chest Diseases, Medical College Hospitals, Calcutta, and Clinic No. III, Bengal Tuberculosis Association).
K. N. De, Research Assistant, Chest Department, Medical College Hospitals, Calcutta (From the Department of Chest Diseases, Medical College Hospitals, Calcutta, and Clinic No. III, Bengal Tuberculosis Association)

