Those who have followed the history of the war will remember how the Serbian Army was threatened with extinction through the deadly disease called TYPHUS. There is no doubt that the army and most of the civil population would have been wiped out had it not been for the timely assistance that that brave little nation received from medical men and women throughout the world, notably America. Many of these brave souls made the final great sacrifice in their endeavour to stamp out this disease. Then again its horrors have been more recently brought to our notice through the revelations of the conditions at Wittenberg Camp in Germany. The story that Captain Vidal and Major Priestly, Officers of the Royal Army Medical Corps, had to tell of their living death in that awful internment camp, brought home to the British people and then to the world, the frightfulness of that disease, as well as the inhumanity of certain German medical officials. Fortunately, typhus has been little known in Western Europe, and it is possible that soldiers in this country will never know its ravages. But all the same it is as well to be prepared for it, and to know the methods of preventing its outbreak. It is a disease that is carried by flees and lice and consequently the most that can be said in a work of this kind is to recommend the greatest pains in the removal of these creatures from the body should they ever take up their residence there. I refer the reader to the chapter on "Vermin" for methods of combating "Lice." DYSENTERY, ENTERITIS, and COLITIS. These names are applied to various kinds and grades of stomach troubles, between which it is difficult for the common soldier to differentiate, and which show themselves with most distressing effects. They come, usually, from drinking bad water or eating bad food. Even with the greatest care that the Commissariat could take, there were occasions when food unfit for human consumption was served to the troops. In the trenches it was not to be wondered at that we were stricken with these diseases, for the flies that infested the trenches and lived on the dead bodies there, favoured us with many visits at food time and poisoned the latter for us. There is no way that I know of to prevent it, and the sufferer will be well advised to report to the medical officer for skilled treatment. Cases of dysentery were not very frequent in France, but they were in Gallipoli where the food supply left much to be desired. TETANUS is a disease that is brought about by infection which enters the system through a wound. In the early part of the war it occurred only too frequently till, in this case also, the skill of the medical profession provided us with a serum to combat it. The universal practice now is to inoculate with anti-tetanic serum just as soon as possible after a wound has been received. By this means tetanus, like enteric, is rapidly ceasing to be regarded as a menace.