J. H. Craven, A text-book on hygiene and pediatrics from a chiropractic standpoint (1924)
“ From the standpoint of common decency we are interested in sanitation or cleanliness, yet an immaculately clean environment will not result in perfect health or in the cure of dis-ease. The streets and alleys of the city may be kept clean and in a sanitary condition, yet the inside of the homes may be filled with filth. So the environment of man may be in a perfect condition so far as sanitation is concerned, yet the body may be filled with all kinds of poison and refuse. ”
