7. I grant that cutaneous humours, and the matter of old sores, when repelled, or suddenly healed, have in some cases fallen upon the lungs, and produced consumption. But I believe, in every case where this has happened, the consumption was preceded by general debility, or that it was not induced, until the whole system had been previously debilitated by a tedious and distressing cough. If the reasonings founded upon the facts which have been mentioned be just, then it follows, III. That the abscess, cough, tubercles, ulcers, and purulent or bloody discharges which occur in the pulmonary consumption, are the _effects_, and not the _causes_ of the disease; and, that all attempts to cure it, by inquiring after tubercles and ulcers, or into the quality of the discharges from the lungs, are as fruitless as an attempt would be to discover the causes or cure of dropsies, by an examination of the qualities of collections of water, or to find out the causes and cure of fevers, by the quantity or quality of the discharges which take place in those diseases from the kidneys and skin. It is to be lamented, that it is not in pulmonary consumption only, that the effects of a disease have been mistaken for its cause. Water in the brain, a membrane in the trachea, and a preternatural secretion of bile, have been accused of producing hydrocephalus internus, cynanche trachealis, and bilious fever, whereas we now know they are the _effects_ of those diseases only, in the successive order in which each of them has been mentioned. It is high time to harness the steeds which drag the car of medicine before, instead of behind it. The earth, in our science, has stood still long enough. Let us at last believe, it revolves round its sun. I admit that the cough, tubercles, and ulcers, after they are formed, increase the danger of a consumption, by becoming new causes of stimulus to the system, but in this they are upon a footing with the water, the membrane, and the bile that have been alluded to, which, though they constitute no part of the diseases that produce them, frequently induce symptoms, and a termination of them, wholly unconnected with the original disease. The tendency of general debility to produce a disease of the lungs appears in many cases, as well as in the pulmonary consumption. Dr. Lind tells us, that the last stage of the jail fever was often marked by a cough. I have seldom been disappointed in looking for a cough and a copious excretion of mucus and phlegm after the 14th or 15th days of the slow nervous fever. Two cases of hypochondriasis under my care, ended in fatal diseases of the lungs. The debility of old age is generally accompanied by a troublesome cough, and the debility which precedes death, generally discovers its last symptoms in the lungs. Hence most people die with what are called the _rattles_. They are produced by a sudden and copious effusion of mucus in the bronchial vessels of the lungs.