Rules to be Obser ved.—A few rules should be carefully followed during each menstruation, in order that future trouble may be prevented. First of all, it is necessar y to avoid taking cold; yet a person should not stay in the house by the side of a fire, or in a warm room all the time, for this would increase the susceptibility to cold. Care should be taken to avoid undue exposure, for nothing will disturb the menstrual process quicker than the sudden chilling of the body, especially when moist with perspi