vere, 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 suit