... Theses de pleuritide

XVII.
It differs from peripneumonia in that in the latter there is a heavy pain, a soft pulse, redness in the cheeks, and a greater difficulty of respiration than in pleurisy. From inflammation of the liver: in this, the pulse is not hard, the pain is not stinging, the tongue is seen to be colored yellow, the face is pale, there is a flux of the bowels, the excrements are similar to the washings of fresh meat; sometimes an inflamed liver is also noted by touch.

XIIX.
It is distinguished from an abscess vomica or suppuration, because in the latter something purulent is thrown up in the sputum immediately on the first day. In pleurisy, however, nothing at all, or certainly no portion of pus. No fever molests one in an abscess, whereas in pleurisy there is a great one. It differs from difficult respiration in that in the latter there is no pain and no great fever, if any is present. Furthermore, that affection is not as acute as pleurisy.

XIX.
Once pleurisy is known, one must hasten to aids. The exuberant humor is to be evacuated; that which is flowing toward the pleura is to be repelled; that which is settled in the affected place, if it is not yet impacted, is to be derived drawn away; if it is impacted, it is partly to be cooked digested and prepared so that it can be brought out through sputum, and partly to be dispersed. If it is attracted by excessive heat or pain, it is to be refrigerated and the pain mitigated; if it is received on account of weakness, one must use strengtheners and the intemperance of the receiving membrane must be amended.

XX.
Parts transmitting the humors are to be reduced to their natural state; a hotter liver is to be refrigerated. Obstructions of this and of the uterus are to be opened; suppressions of blood are to be evoked; humors flowing down from the head are to be led out through suitable places and drawn away; the remaining causes, both internal and external, are to be brought, as much as is permitted, into a state contrary to the disease.

XXI.
Pleurisy is numbered by Hippocrates among the doubtful diseases. For by its own nature, it is neither lethal nor salutary, but according to the variety of its differences, it is sometimes dangerous and sometimes free from danger.

XXII.
For when internal parts are affected, a greater danger threatens than when external ones are, and the right side is less to be feared than the left. If it happens...