Class IV. i. i. 6. OF ASSOCIATION. 371 



the membrane, which lines the noftrils, are excited into greater 

 action ; when thofe of the fkin, with which they are aflbciated, 

 are. excited into lefs action by the deficiency of external heat, 

 by reverfe fympathy ; and though the pain of cold attends the 

 torpor of the primary link of this aflbciation, yet the increafed 

 motions of the membrane of the noftrils are aflbciated with 

 thofe of the cutaneous veflels, and not with the pain of them, 

 becaufe no inflammation follows. 



6. Abforptio cellularis aufta vomitu. In the act of vomiting 

 the irritative motions of the ftomach are inverted, and of the 

 abforbents, which open their mouths into it ; while the cutane- 

 ous, cellular, and pulmonary abforbents are induced, by reverfe 

 fympathy with them, to act with greater energy. This is feen 

 in cafes of anafarca, when long ficknefs and vomiting are cauf- 

 ed by fquills, or antimonial falts, or moil of all by the decoction 

 of digitalis purpurea, foxglove ; and Mr. J. Hunter mentions a 

 cafe, in which a large bubo, which was juft ready to break, 

 was abforbed in a few days by ficknefs at fea. Treatife on the 

 Blood, p. 501, which is thus accounted for*, lefs fenforial pow- 

 er is expended during ficknefs by the decreafed action of the 

 fibres of the ftomach, and of its abforbents ; as (hewn in Sect. 

 XXXV. 1. 3. whence an accumulation of it is produced, and 

 there is in confequence a greater quantity of fenforial power 

 for the exertion of thofe motions, which are aflbciated with the 

 abforbents of the ftomach by reverfe fympathy. 



The reverfe fympathy between the lacteal and lymphatic 

 branches of the abforbent fyftem have been produced by the one 

 branch being lefs excited to act, when the other fupplies fuffi- 

 cient fluid or nutriment to the fanguiferous veflels. Thus when 

 the ftomach is full, and the fupply of chyle, and mucus, and 

 water is in fufficient quantity ; the pulmonary, cellular, and cu- 

 taneous lymphatics are not excited into action •, whence the 

 urine is pale, and the fkin moid, from the defect of abforption 

 on thofe furfaces. 



7. Singultus nephriticus. "When a ftone irritates the ureter, 

 and that even without its being attended with pain or fever, 

 fometimes a chronical hiccough occurs, and continues for days 

 and weeks, inftead of ficknefs or vomiting ; which are the com- 

 mon fymptoms. In this cafe the motions of the ftomach are 

 decreafed by their fympathy with thofe of the ureter, which are 

 increafed by the ftimulus of the ftone in it j and the increafed 

 motions of the diaphragm feem to exift in confequence of their 

 aflbciation with the ftomach by a fecond reverfe fympathy. This 

 hiccough may nevertheiefs admit of another explanation, and 

 be fuppofed to be a convulfivc exertion of the diaphragm to re- 

 lieve 



