A narrow tongue, with deep median fissure on each side of which is a thick rough fur, the tip and edges being red and denuded, is characteristic of typhoid states whether arising from typhoid or not. The same condition will be found in profound intoxication from septic poisons. If the tongue becomes dry and brown, tremulous when protruded, and the patient returns it slowly when requested to do so, he has typhoid beyond question. A brown fur on the root of the tongue, especially in the morning, indicates a sluggish condition of the liver. In jaundice the tongue is yellow. It is estimated that the normal man in a state of rest will breathe sixteen times per minute. Any radical departure from the rate will indicate disease. An increase of two respirations per minute is supposed to indicate a rise of one degree F. in the body temperature, though this rule is subject to variations. Inspection of the bare chest tells the trained physician much regarding the condition of his patient and even the layman can glean much knowledge from that source. If the patient is breathing from twenty-five to thirty-five times per minute, the respiration being confined to one lung as indicated by the lack of expansion in the other, and if he lies so as to take the strain off the lung that does not expand, it is almost sure that the patient has pneumonia. In case the lung is fixed rigidly by the muscles and the opposite lung forced to do all the work, then the patient has pleurisy. In profound typhoid states the breathing is very much slowed and irregular, at last presenting what is known as the Cheyne-Stokes respiration, in which the patient will breathe several short shallow respirations, pause for a time, heave a deep sigh and then repeat the rapid breathing. This type of breathing is looked upon as a very grave symptom in all conditions characterized by lack of physical strength. It will be readily appreciated that only enough discussion of symptoms has been given above to aid somewhat in arriving at a diagnosis. To go deeply into physical indications of diseases would be manifestly out of place in an article of this character. We will now proceed to the consideration of the diseases that will be most frequently encountered in the camp. Of these the intestinal troubles stand pre-eminent. Change of water, food, methods of life, and personal habits account for the fact that nearly every person who seeks the outdoors at some time during his stay is afflicted with some one of the diarrheas. Without attempting to go deeply into the various classifications of the enteric complaints, a brief résumé of the guiding symptoms common to all will be given.