3. Sufficient nourishing food properly prepared and properly taken.
4. Sufficient exercise of the various organs of the body.
5. The proper amount of rest and sleep.
6. Right temperature.
7. Proper clothing.
8. Sufficient, cheerful, innocent enjoyment.
9. Exemption from harassing cares.
Conform strictly to these rules and all avoidable disease will be annihilated. On the other hand, where hygienic and sanitary science is not enforced, filth, decay and putrifying matter is sure to accumulate. In this we have suitable material for the propagation of disease germs, which cause all communicable and contagious diseases. These minute organisms exist in the atmosphere everywhere, and multiply by their own peculiar method of procreation; such as filth, heat and moisture.
A population under the influence of vice, poverty, filth, debauchery, foul air, poorly prepared food and crowded dwellings, or in low, damp localities, with no rule regulating their eating or sleeping, clothing or exercise, is sure to have a great degree of mortality.
With our thorough knowledge of how to prevent epidemics, most of the diseases that enter the body through the respiratory, digestive, cutaneous, circulatory, nervous, and genito-urinary systems should be less frequent. Taking the facts which I have here given into account one may see that not only do health and longevity depend upon laws which we can understand and successfully operate, but man has it in his power to modify to a great extent the circumstances in which he lives, with a view to the promotion of his well-being and preservation.