3<58 DISEASES CLASS IV. i; t. 



We fhall only add, that the motions of the mufcular fibres of 

 the ftomach are aflbciated with thofe of the heart and arteries 

 by direct fympathy, as appears by the weaknefs of the pulfe 

 during the exhibition of an emetic ; and that the abforbents of 

 the ftomach are aflbciated with the cellular and cutaneous abfor- 

 bents by reverfe fympathy, as is fhewn by the great abforption 

 of the mucus of the cells in anafarca during ficknefs , at the 

 fame time that the abforbents of the ftomach invert their actions, 

 and pour the mucus and water thus abibrbed into that vifcus. 



In cold paroxyfms of fever the ftomach partakes of the gen- 

 eral torpor, and vomiting is induced by its debility, either by 

 its aflbciation with the torpid capillaries, or other torpid parts, or 

 by its own torpor commencing firft, and caufing the cold fit. 

 The difordered motions of the ftomach frequently feem to be the 

 caufe or primary feat of fever, as where contagious miafrna are 

 fwallowed with the faliva,and where fever is produced by fea-fick- 

 nefs, which I once faw. Neverthelefs a diforder of the ftomach 

 does not always induce fever, as in that cafe it fhould conftantly 

 attend indigeftion,and vertigo, and fea-ficknefs ; but is itfelf fre- 

 quently induced by aflbciation with the difordered movements of 

 other parts of the fyftem, as when it arifes from gravel in the 

 ureter, or from a percuffion on the head. 



The connexion of the motions of the ftomach with irritative 

 ideas, or motions of the organs of fenfe, in vertigo, is (hewn in 

 Seel:. XX. and thus it appears, that many circles of aflbciation 

 are either directly or reverfely aflbciated, or catenated, with this 

 s ; which will much contribute to unfold fome of the fymp- 

 toii-G of fever. 



K. Tertian Ajficiations . 



The third link of aflbciate trains of motion is fometimes actu- 

 ated by reverfe fympathy, with the fecond link, and- that by re- 

 verfe fympathy with the firft link ; fo that the firft and third link 

 may aft by direct fympathy, and the intermediate one by re- 

 verfe fympathy. Of this, inftances are given in the fingultus 

 nephriticus, Ciafs IV. i. i. 7. and IV. 2. r. At other times 

 the tertian or quartan links of aflbciate motions are actuated by 

 direct fympathy j and that fometimes forwards and fometimes 

 backwards in refpect to the ufual order of thofe trains of aflbci- 

 ate motions, as in Clafs IV. i. 2. i. 



SPECIES, 



i , Rubor vithiis pranforum. Flufhing of the face after dinner 





