At first glance, this may seem to be contrary to common experience as well as to the theory and practice of medical science. But let us follow the development of a cold from start to finish. This will throw some light on the question as to whether it can be caught, or whether it develops slowly within the organism; also whether this development or incubation may extend over a long period of time. Taking cold may be caused by chilling of the surface of the body or part of the body. In the chilled portions of the skin the pores close, the blood recedes into the interior, and as a result of this the elimination of poisonous gases and exudates through these portions of the skin is suppressed. This catching a cold through being exposed to a cold draft, through wet clothing, etc., is not necessarily followed by more serious consequences. If the system is not too much encumbered with morbid matter and if kidneys and intestines are in fairly good working order, these organs will take care of the extra amount of waste and morbid materials in place of the temporarily inactive skin and eliminate them without difficulty. The greater the vitality and the more normal the composition of the blood, the better the system will react in such an emergency and throw off the morbid matter which failed to be eliminated through the skin. If, however, the organism is already overloaded with waste and morbid materials, if the bowels and the kidneys are already weakened and atrophied through continued overwork and overstimulation, if, in addition to this, the vitality has been lowered through excesses or overexertion and the vital fluids are in an abnormal condition, then the morbid matter thrown into the circulation by the chilling and temporary inactivity of the skin cannot find an outlet through the regular channels of elimination and endeavors to escape by way of the mucous linings of the nasal passages, the throat, bronchi, stomach, bowels and genitourinary organs. The waste materials and poisonous exudates which are being eliminated through these internal membranes cause irritation and congestion, and thus produce the well-known symptoms of inflammation and catarrhal elimination: sneezing (coryza), cough, expectoration, mucous discharges, diarrhea, leucorrhea [vaginal dis-charge], etc. In other words, these so-called colds are nothing more or less than different forms of vicarious elimination. The membranous linings of the internal organs are doing the work for the inactive, sluggish and atrophied skin, kidneys and intestines. The greater the accumulation of morbid matter in the system, the lower the vitality, and the more abnormal the composition of the blood and lymph, the greater will be the liability to the catching of colds.