. 1. 1 6. OF ASSOCIATION. 



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

 action; when those of the skin, with which they are associated, 

 are excited into less action by the deficiency of external heat, 

 by reverse sympathy; and though the pain of cold attends the 

 torpor of the primary link of this association, yet the increased 

 motions of the membrane of the nostrils are associated with those 

 of the cutaneous vessels, and not, with the pain of them, because 

 o inflammation follows. 



6. Jlbsorptio celhdaris aucta vomitu. In the act of vomiting 

 the irritative motions of the stomach are inverted, and of the ab- 

 sorbents, which open their mouths into it; while the cutaneous, 

 cellular, and pulmonary absorbents are induced, by reverse sym- 

 pathy with them, to act with greater energy. This is seen in 

 cases of anasarca, when long sickness and vomiting are caused 

 by squills, or antimonial salts, or most of all by the decoction of 

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

 in which a large bubo, which was just ready to break, was ab- 

 sorbed in a few days by sickness at sea. Treatise on the Blood, 

 p. 501, which is thus accounted for; less sensorial power is ex- 

 pended during sickness by the decreased action of the fibres of 

 the stomach, and of its absorbents; as shewn in Sect. XXXV. 

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

 consequence a greater quantity of sensorial power for the exertion 

 of those motions, which are associated with the absorbents of the 

 stomach by reverse sympathy. 



The reverse sympathy between the lacteal and lymphatic 

 branches of the absorbent system have been produced by the one 

 branch being less excited to act, when the other supplies sufficient 

 fluid or nutriment to the sanguiferous vessels. Thus when the 

 stomach is full, and the supply of chyle, and mucus, and water is 

 in sufficient quantity; the pulmonary, cellular, and cutaneous lym- 

 phatics are not excited into action; whence the urine is pale, 

 and the skin moist, from the defect of absorption on those sur- 

 faces. 



7. Singultus nephriticus. When a stone irritates the ureter, 

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

 sometimes a chronical hiccough occurs, and continues for days 

 and weeks, instead of sickness or vomiting; which are the com- 

 mon symptoms. In this case the motions of the stomach are 

 decreased by their sympathy with those of the ureter, which are 

 increased by the stimulus of the stone in it; and the increased 

 motions of the diaphragm seem to exist in consequence of their 

 association with the stomach by a second reverse sympathy. This 

 hiccough may nevertheless admit of another explanation, and 

 be supposed to be a convulsive exertion of the diaphragm te re* 



