18. Spend the evening profitably and pleasantly and in ways compatible with the foregoing habits.
19. Retire regularly at a fixed hour, making up for irregularity by an earlier hour next night.
20, 21, 22. Repeat 4, 6, 8.
23. Turn underclothes wrong side out for ventilation.
24. Open windows.
25. Relax mind and body and go to sleep.
No man chronically neglects any one of the above rules without reducing his industrial efficiency. No man chronically neglects all of them without becoming, sooner or later, a health bankrupt.
In addition to this daily routine, there are certain other acts that should become habitual:
1. Bathing less frequently than once a week is almost as dangerous to health as it is to attractiveness.
2. Distaste for unclean linen or undergarments and for acts or foods that interfere with vitality should become instinctive.