Man's Threefold Nature and Relationship to Remedies

So you can see that a system, a rationale in these matters, is only obtainable when we envisage the relationship of man to his environment. And I would draw your attention to another point that is curiously significant. I do not know how many of you some time ago noticed the most preposterous placards forbidding people to spit. As you know the purpose behind them was to combat tuberculosis. These prohibitory placards are abjured for the reason—which ought to be common knowledge—that the daily diffused light of the sun destroys the bacilli of tuberculosis in a very short time. If you examine a sputum specimen after a short time, it contains no more such bacilli. So that even if the assumption of current medicine were valid—this prohibition would be extremely absurd. Such prohibitions have significance for the elementary observance of cleanliness, but not for the widest aspects of hygiene.