402 DISEASES CLASS IV. 2. i. 7, 



geftion imperfe&ly, in confequence of their aflbciation with the 

 torpid motions of the veflels of the extremities. Fear, as it pro- 

 duces palenefs and torpidity of the fkin, frequently occafions tem- 

 porary indigeftion in confequence of this aflbciation of the vef- 

 fels of the {kin with thofe of the ftomach ; as riding in very bad 

 roads will give flatulency and indigeftion to timorous people. 



A fhort expofure to cold air increafes digeftion, which is then 

 owing to the reverfe fympathy between the capillary veflels of 

 the {kin, and of the ftomach. Hence when the body is expofed 

 to cold air, within certain limits of time and quantity, a reverfe 

 fympathy of the ftomach and the {kin firft occurs, and after- 

 wards a direcl: fympathy. In the former cafe the expendi- 

 ture of fenforial power by the (kin being leflened, but not its 

 production in the brain ; the fecond link of the aflbciation, viz. 

 the ftomach, acquires a greater (hare of it. In the latter cafe, 

 by the continuation of the deficient ftimulus of heat, the torpor 

 becomes extended to the brain itfelf, or to the trunks of the 

 nerves ; and univerfal inactivity follows. 



7. TuJ/is a pedibus frigidis. On {landing with the feet in 

 thawing fnow, many people are liable to inceflant coughing. 

 From the torpidity of the abforbent veflels of the lungs, in con- 

 fequence of their irritative aflbciatiens with thofe of the (kin, 

 they ceafe to abforb the faline part of the fecreted mucus ; and 

 a cough is thus induced by the irritation of this faline fecretion ; 

 which is fimilar to that from the noftrils in frofty weather, but 

 differs in refpedl: to its immediate caufe ; the former being from 

 aflbciation with a diftant part, and the latter from defecl: of 

 the ftimulus of heat on the noftrils themfelves. See Catarrhus 

 frigidus, Clafs I. 2. 3. 3. 



8. Tuffls hepatica. The cough of inebriates, which attends 

 the enlargement of the liver, or a chronical inflammation of its 

 upper membrane, is fuppofed to be produced by the inconveni- 

 ence the diaphragm fuflers from the compreflion or heat of the 

 liver. It differs howevex eflentially from that attending hepati- 

 tis, from its not being accompanied with fever. And is per- 

 haps rather owing to irritative aflbciation, or reverfe fympathy, 

 between the lungs and the liver. As occurs in flieep, which 

 are liable to a perpetual dry cough, when the fluke-worm is prey- 

 ing on the fubftance of their livers. See Clafs II. i. I. 5. 



M. M. From half a grain to a grain of opium twice a day. 

 A drachm of mercurial ointment rubbed on the region of the 

 liver every night for eight or ten times. 



9. Tuffis arthritica. Gout-cough. I have feen a cough, 

 which twice recurred at a few years diftance in the fame per- 

 !!!, during his ffts of tke gout, with fuch pertinacity and vio- 

 lence 



