But, when your situation will admit of it, I would advise you to take a portion of your exercise in those domestic employments which require vigorous exertion. If you open your windows, you will have the fresh air; at the same time, you will enjoy the satisfaction of rendering your hours of relaxation useful. 5. _Bathe frequently._ About five eighths of the food taken into the stomach passes off by insensible perspiration, through the pores of the skin; and with it is thrown off whatever impure matter is found in any part of the system. When this perspiration is obstructed, general derangement succeeds. It is chiefly to promote this that exercise is required. But the matter thrown off is of a very poisonous nature; and if not removed may he absorbed again into the system It also collects upon the surface, and obstructs the regular discharge from the pores. Frequent ablution is therefore highly necessary. It is also essential to personal cleanliness. There is an _odor_ in this insensible perspiration, which becomes offensive when the impurities collecting upon the surface of the skin are not frequently removed. The entire surface of the body should be washed every day; and if this is done on rising in the morning, with cold water, and followed with brisk rubbing with a coarse towel, it will furnish an effectual safeguard against taking cold. This, however, should be remitted, when there is any danger to be apprehended from the sudden application of cold; or serious consequences may follow. Tepid water, with soap, should occasionally be used at night, in order to remove all impurities from the skin.