2922. Therefore, our dwellings should freely admit the solar rays.
2923. Decomposing animal and vegetable substances yield various noxious gases, which enter the lungs and corrupt the blood.
2924. Therefore, all impurities should be kept away from our abodes, and every precaution be observed to secure a pure atmosphere.
2925. Warmth is essential to all the bodily functions.
2926. Therefore, an equal bodily temperature should be maintained by exercise, by clothing, or by fire.