424 DISEASES CLASS IV. 2. 3. 3, 



acquired the Chorea St. Viti in fo univerfal a manner, that her 

 fpeech became affecled as well as her hmbs ; and there was evi- 

 dently a difunion of the common trains of ideas ; as the itch 

 was ftiil among the younger children of the family, fhe was ad- 

 vifed to take her fitter as a bedfellow, and thus received the itch 

 again ; and the dance of St. Vitus gradually ceafed. See Clafs 

 II. i. 5. 6. 



M. M. Give the patient the itch again. Calomel a grain 

 every night, or fublimate a quarter of a grain twice a day for a 

 fortnight. Steel. Bark. Warm bath. Cold bath. Opium. 

 Venefection once at the beginning of the difeafe. Electricity. 

 Perpetual How and repeated efforts to move each limb in the 

 defigned direction, as in the titubatio linguae above defcribed. 



3. Rifus. Laughter is a perpetual interruption of voluntary 

 exertion by the interpofition of pleafurable fenfation ; which not 

 being checked by any important confequences rifes into pain, 

 and requires to be relieved or moderated by the frequent repe- 

 tition of voluntary exertion. See Sect. XXXIV. I 4. and 

 Clafs III. i. i. 4. and IV. i. 3. 3. 



4. Tremor ex ira. The trembling of the limbs from anger. 

 The interruption of the voluntary aflbeiations of motions by an- 

 ger, originates from too great a part of the fenforial power being 

 exerted on the organs of fenfe ; whence the mufcles, which ought 

 to fupport the body upright, are deprived of their due quantity, 

 and tremble from debility. See Clafs III. 2. i. I. 



5. Rubor extra. Rednefs from anger. Anger is an excefs 

 of aver(ion, s that is of voluntarily not yet employed. It is excit- 

 ed by the pain of offended pride ; when it is employed it be- 

 comes outrage, cruelty, infanity. The cutaneous capillaries, 

 efpecially thofe of the face, are more mobile, that is, more eafi- 

 ly excited into increafed action, or more eafily become torpid, 

 from lefs variation of fenforial power, than any other parts of 

 the fyftem, which is owing to their being perpetually fubject to 

 the vicifTitudes of heat and cold, and of extenfion and corruga- 

 tion. Hence, when an excefs. of voluntarity exifts without be- 

 ing immediately expended in the actions of the large mufcles, 

 the capillary arteries and glands acquire more energetic action, 

 and a flufhed fkin is produced, with increafed fecretion of per- 

 fpirable matter, and confequent heat, owing to the paufe or in- 

 terruption of voluntary action ; -and thus the actions of thefe 

 cutaneous veflels become ailbciated between the irafcent ideas 

 and irafcent mufcular actions, which are thus for a time inter- 

 rupted. 



6. Rubor criminati. The blufhing of accufed people, wheth- 

 er guilty or not, appears to be owing to circumiiances fimilar to 



that 



