But as this kind of sensitiveness is, in healthy persons, very much a matter of habit, it is perhaps quite as well for such to accustom themselves to wearing an ordinary doubled boot through the winter, unless much exposed, and put on a light boot, shoe, or gaiter for the summer. Appropriateness and adaptation to weather or circumstances are always to be considered. A heavy leather boot with double sole is as much out of place and time in a warm day, as a light cloth gaiter in a snow-storm. While the latter would expose the foot unnecessarily, the first, besides being uncomfortable, keeps the foot in an unnaturally sensitive condition. It is not intended to make any suggestions to _invalids_. We only state the well-known rule that exposure to cold makes the feet, or any other part of the body, more hardy, when there is an ordinary state of health, or sufficient blood in the system to be easily drawn to the surface by this demand. Where there is too little vitality for this, the experience of the person or the counsel of the physician is the best guide. So also in regard to dampness or wetting the feet. While making no law for sickly or feeble constitutions, it seems to us very evident that the more often the feet are exposed to damp or wet, the greater the ability acquired by the system to resist it;[12] and that when the feet happen to get wet only occasionally, the consequences of the exposure are proportionately more serious. It is probable that if care were taken to keep the feet _comfortably warm_ when wet, either by exercise, as in walking, or in some other manner, there would be very little danger from the wet alone, unless in cases of invalid feebleness, or where they were dampened so seldom that the intelligence of the physical system was unprepared for such an occurrence.