From these opinions and examples it seems quite clear that whatever portions of the decomposition products of tobacco reach the mouth and mix with the saliva, or propagate themselves in the immediate surroundings of the smoker, are likely to have extremely good effects. It would be easy to multiply these opinions but there is no use laboring the argument. There is a matter, however, it will do no harm to mention here. Today it is being gradually recognized by the medical profession that the conditions which lead ultimately to gastric and intestinal ulcer including appendicitis are entirely due to infection. At the 1912 meeting of the British Medical Association this was clearly manifested and some of the leading authorities in England pointed out the importance of the mouth as a focus of infection in such diseases. Now if this is so, it is at once apparent how important tobacco as a mouth disinfectant and germicide becomes; and it may incidentally throw some light (otherwise unexplained) on the fact constantly observed that in persons under 30 years old these diseases are far more common amongst women than in the case of men. The use of tobacco is not asserted as a reason, but it may be. With regard to other beneficial effects--Clouston, Fullerton and Marvin, state that the moderate use of tobacco has a beneficial effect on the digestive system as in general it causes an increased flow of saliva and gastric juice which helps in the digestion of food; it also stimulates the muscles and mucous membrane of the stomach and intestines. The sedative effects of tobacco on the nerves is a preventative of nervous dyspepsia and is valuable for the promotion of good digestion.