A Cold in Truth is almost constantly an inflammatory Disease; a light Inflammation of the Lungs, or of the Throat; of the Membrane or very thin Skin, which lines the Nostrills, and the Inside of certain Cavities in the Bones of the Cheeks and Forehead. These Cavities communicate with the Nose, in such a Manner, that when one Part of this Membrane is affected with an Inflammation, it is easily communicated to the other Parts. Sec. 126. It is scarcely necessary to describe the Symptoms of a Cold, and it may be sufficient to remark, 1. That their chief Cause is the same with that, which most commonly produces the Diseases already treated of, that is, an obstructed Perspiration, and a Blood somewhat inflamed. 2. That whenever these Diseases affect great Numbers, many Colds prevail at the same Time. 3. That the Symptoms which manifest a violent Cold, greatly resemble those which precede or usher in these Diseases. People are rarely attacked by great Colds, without a shivering and Fever; which last sometimes continues for many Days. There is a Cough, a dry Cough, for some Time; after which some Expectoration ensues; which allays the Cough, and lightens the Oppression; at which Time the Cold may be said to be maturated, or ripe. There are pretty often slight Stitches, but unfixed or flying about, with a little Complaint of the Throat. When the Nostrills happen to be the Seat of the Disorder, which is then very improperly termed a Cold of the Brain, it is often attended with a vehement Head-ach; which sometimes depends on an Irritation of the Membrane, that lines the Cavities in the Bone of the Forehead, or the maxillary Sinusses, that is, the Cavities in the Jaws: At first the Running from the Nose is very clear; thin and sharp; afterwards, in Proportion to the Abatement of the Inflammation, it becomes thicker; and the Consistence and Colour of it resemble those of what others cough up. The Smell, the Taste and the Appetite are commonly impaired by it.