yielded to, another paroxysm of Night-Mare is for the most part inevitable. Where the Disease has not established itself by very frequent recurrence, the patient generally feels little inconvenience from it when thoroughly awoke; but where it is habitual, there will generally be felt some confusion in the head, with singing in the ears, a sense of weight about the forehead, and, if in the dark, luminous _spectra_ are frequently seen, such as appear to persons who immediately after gazing on a strong light, close their eyes. The pulse, I believe, will in all instances be found to be considerably accelerated; in my own case the motion of the heart amounts almost to a palpitation. I do not find this symptom taken notice of by any writer on the subject, excepting Etmuller, whose accuracy in tracing the history of every disease allowed no symptom to escape him. When reasoning on the phenomena which this affection exhibits, “_et cum etiam simul sub respirationis defectu imminuta plus minus evadat sanguinis circulatio, ob id ab eodem infarcti pulmones anxietatem insignem præcordiorum inducunt: sicut dum evigilant tales ægri, cor insignitur palpitat, quod testatur motum convulsivum_.”--This palpitation of the heart grows stronger in proportion to the length of the paroxysm, or the difficulty the patient finds in waking himself. There is, however, another symptom, which, as far as I am able to learn, is very frequent, though not noticed by medical writers. (_Scilicet._) _Priapismus interdum vix tolerabilis et aliquamdiu post paroxysmi solutionem persistens._ I have noticed this symptom here, as I intend presently to draw some inference from it. A sense of weight at the stomach, and an unpleasant taste in the mouth will generally be found to remain after the paroxysm, though seldom noticed, as it is not suspected to have any connexion with the Night-Mare.