The causes of some of the phœnomena of this disease are easily discovered; those of the others are involved in obscurity, and form a very curious subject for investigation. I shall not at present trouble you with the ideas relating to them, which have occurred to me, but hope to be able to present some additional remarks on the subject, at a future period. In the mean time, I beg leave to invite the attention of the society to the observation of the symptoms of this interesting disorder, and of the morbid appearances in the dead bodies of those, who have become its victims. * * * * * At the time the preceding pages were going to the press, the subjects of the ninth and tenth cases died, on the same day, and an opportunity was given of ascertaining whether their complaints had been rightly distinguished. It is a proof of an enlightened age and country, that no objections were made in any instance to the examinations, which have afforded us so much useful information. DISSECTION OF CASE NINTH. THIRTY HOURS AFTER DEATH. The lady, who was the subject of this case, died on the 10th of May, but she was not seen by me after the 29th of March; so that it is not in my power to relate exactly the symptoms which attended the latter stages of her complaint. I was informed, however, that they increased in violence, especially the difficulty of breathing, and inability to lie down; that her cough returned, and her expectoration was sometimes bloody; and that, for sometime before death she suffered inexpressible distress. We found the body somewhat emaciated, and the lower extremities and left arm œdematous. Might not this swelling of the left arm have depended on her constant posture of inclining to her left side? The face, especially at the lips, was livid, though not so much as in many other cases of this disease. On the left shoulder were small, hard, and prominent livid spots.