That is, there must be ample intake of food and oxygen, thorough removal of waste, quick distribution of fuel, oxygen, and waste, economical working of the organism. The whole body must be organically sound, and all its functions must go on efficiently and vigorously.

Developing Vitality to Resist Disease. Disease may be due to:

a. Some defect of structure in an organ as the heart, spinal column, eye, tooth

b. Ineffective functioning of an organ or system, as in constipation, slow circulation, shallow breathing

c. Low resistance to disease germs or poisons, as in the contracting of influenza, diarrhea, pneumonia, whooping cough

The Means for Developing Vitality.

1. Good nutrition. This involves sound digestion and assimilation. It can be assured only through:

a. Wholesome foods, adapted to the age in quantity and preparation

b. Sound teeth