not be, as it may not invariably be, the confidence and the gratitude of his patient, will at least be the proud consciousness that he has deserved both. Were it possible to ascertain with absolute certainty and with perfect exactness in which of its various modes inflammation of the brain and its membranes terminates, it would be a subject of interest, as far as we can at present perceive, rather to the physiologist and pathologist than to the practical physician. To the latter the great fact which it is of paramount importance that he should know is, that inflammation is going on in the brain of his patient, and that if he cannot put a stop to it in the course of a day or two, it will in that short space of time terminate in some irreparable change of structure, of which death will be the inevitable consequence. This, it is again repeated, it is always in his power to know; and as there is no one fact which can or which ought to have so much influence upon his practice, so there is no diagnosis which it is of so much importance that he should acquire the habit of forming. II. CASES IN ILLUSTRATION OF THE MORBID CHANGES WHICH TAKE PLACE WITHIN THE CHEST; OR THORACIC CASES. CASE VII. ANGELICA FIDGETT. For symptoms see page 125. _Thorax._ Mucous membrane of bronchi, in all their ramifications, exceedingly inflamed; bronchial tubes full of mucus; [substance of left lung extremely inflamed; left pleuræ adherent; right pleuræ and lung much less severely affected.] _Head._ Substance of brain vascular. _Abdomen._ All the viscera healthy except the uterus and its appendages, which were slightly inflamed. CASE VIII. JOHN POTTER, æt. 21. For symptoms see page 127. _Thorax._ Mucous membrane of bronchi, in all their ramifications, of dark red colour; bronchial glands much enlarged; [pleuræ of right side generally adherent; substance of lungs consolidated; pericardium contained four ounces of serum;] heart natural. _Abdominal_ and _cerebral_ organs healthy. CASE XIV. ALEXANDER CROMBIE, æt. 19, seaman. For symptoms see page 159.