No one questions that tobacco smoke irritates the mucous lining of the mouth, nose and throat, or that it aggravates hoarseness, coughing, chronic bronchitis and tonsillitis. It is accepted without argument that smoking is forbidden in cases of gastric and duodenal ulcers; that is interferes with normal digestion; that it contracts the blood vessels, increases the heart rate, raises the blood pressure. In many involvements of heart disease, the first order from the doctor is to cut out smoking immediately. But what gives grave concern to public-health leaders is that the increase in lung-cancer mortality shows a suspicious parallel to the enormous increase in cigarette consumption (now 2500 cigarettes per year for every human being in the United States) A study done by a group of noted cancer workers head by Dr. Alton Ochsner, former president of the American Cancer Society and director of the famous Ochsner Clinic in New Orleans, discloses that, during the period 1920 to 1948, deaths from bronchiogenic carcinoma in the United States increased more than ten times, from 1.1. to 11.3 per 100,000 of the population. From 1938 to 1948, lung-cancer deaths increased 144 percent.