There are several sorts of that Distemper named _Madness_; but they all proceed through the Irregularities, either of the Rational, or the Sensitive Parts; and sometimes from the Irregularities both of Sense and Reason: but these Irregularities are not such as are quite different from the Nature or Property of a Human Creature, but are only such Irregularities as make false Perceptions of Forrein Objects, or else make strange Conceptions; or move after the manner of Dreams in waking-actions; which is not according to the Perception of present Objects: As for example, The Sensitive Motions of the Exterior Parts, make several Pictures on the outside of the Organs; when as no such Object is present; and that is the reason Mad-men see strange and unusual Sights, hear strange and unusual Sounds, have strange and unusual Tasts and Touch: but, when the Irregularities are only amongst the Rational Parts, then those that are so diseased, have violent Passions, strange Conceptions, wild Fancies, various Opinions, dangerous Designs, strong Resolutions, broken Memories, imperfect Remembrances, and the like. But, when both the Sensitive and Rational are sympathetically disorderly; then the Mad-men will talk extravagantly, or laugh, sing, sigh, weep, tremble, complain, &c. without cause. CHAP. IX. The Sensitive and Rational Parts may be distinctly Mad. The Senses may be irregularly Mad, and not the Reason; and the Reason may be irregularly mad, and not the Sense; and, both Sense and Reason may be both sympathetically mad: And, an evident proof that there is a Rational and Sensitive Madness, is, That those whose Rational Parts are Regular, and only some of the Sensitive Irregular, will speak soberly, and declare to their Friends, how some of their Senses are distemper'd, and how they see strange and unusual Sights, hear unusual Sounds, smell unusual Sents, feel unusual Touches, and desire some Remedy for their Distempers. Also, it may be observed, That sometimes the Rational Parts are madly distemper'd, and not the Sensitive; as when the Sensitive Parts make no false Perceptions, but only the Rational; and then only the Mind is out of order, and is extravagant, and not the Senses: but, when the Senses and Reason are madly Irregular, then the diseased Man is that we name, _Outragiously Mad_. CHAP. X. The Parts of the Head are not only subject to Madness, but also the other Parts of the Body.