*Precautions in Recovery from Disease.*—Many diseases, if severe, not only leave the body in a weakened condition, but may, through the toxins which the germs deposit, cause untold harm if the patient leaves his bed or resumes his usual activities too soon. Especially is this true of typhoid fever,(134) diphtheria, scarlet fever, and measles. Rheumatism and affections of the heart, lungs, kidneys, and other bodily organs frequently follow these diseases, as the result of slight exposure or exertion before the body has sufficiently recovered from the effects of the toxins. To guard against such results, certain physicians require their patients to keep their beds for a week, or longer, after apparent recovery from diseases like typhoid fever, diphtheria, and scarlet fever. *Relation of Vocation to Disease.*—With a few exceptions, the pursuit of one’s vocation, or calling in life, does not supply either the quantity or the kind of activity that is most in harmony with the plan of the body. Especially is this true of work that requires most of the time to be spent indoors, or which exercises but a small portion of the body. The effect of such vocations, if not counteracted, is to weaken certain organs, thereby disturbing the functional equilibrium of the body—a result that may be brought about either by the overwork of particular organs or by lack of exercise of others. Herein lies the explanation of the observed fact that people of the same calling in life have similar diseases. *A Special Problem for the Brain Worker.*—Farthest removed from those forms of activity which harmonize with the plan of the body, and which therefore are most hygienic, is that class of workers known as the professional class, or the "brain workers." This class includes not only the members of the learned professions—law, medicine, and the ministry—but a vast army of business men, engineers, teachers, stenographers, office clerks, etc., a class that is ever increasing as our civilization advances. It is this class in particular that must give attention to those conditions that indirectly, but profoundly, influence the bodily well-being and must seek to obviate if possible such weaknesses as the occupation induces. *The Remedy* lies in two directions—that of spending sufficient time away from one’s work to allow the body to recover its normal condition, and that of counteracting the effect of the work by special exercise or other means. In many cases the first symptoms of weakness indicate a suitable remedy. Thus exhaustion from overwork suggests rest and recreation. The diverting of too much blood from other parts of the body to the brain suggests some form of exercise which will equalize the circulation. If feebleness of the digestive organs is being induced, some natural method of increasing the blood supply to these organs is to be looked for. And effects arising from lack of fresh air and sunlight are counteracted by spending more time out of doors.