364 DISEASES CLASS IV. 1. 1. 



becomes increased by the accumulation of sensorial power dur- 

 ing its previous torpor, or by increase of stimulus, the actions of 

 the second part of it likewise become increased by direct sym- 

 pathy. 



In moderate hunger the skin is pale, as before dinner, and in 

 moderate sickness, as no great accumulation of sensorial power 

 has commenced; but in violent hunger, and in greater torpor of 

 the stomach, as from contagious matter, the accumulation of sen- 

 sorial power becomes so great as to affect the arterial and capillary 

 system, and fever is produced in both cases. 



In contagious fevers with arterial debility, commencing with 

 torpor of the stomach, why is the action of the heart weakened, 

 and that of the capillaries increased? Is it because the mobility of 

 the heart is less than that of the stomach, and the mobility of the 

 capillaries greater? Or is it because the association between the 

 muscular fibres of the stomach and those of the heart have been 

 uniformly associated by direct sympathy; and the capillaries of 

 the stomach and those of the skin have been more frequently as- 

 sociated by reverse sympathy? 



Where the actions of the stomach have been previously ex- 

 hausted by long stimulus, as on the day after intoxication, little 

 or no accumulation of sensorial power occurs, during the torpor 

 of the organ, beyond what is required to replace the deficiency of 

 it, and hence fever seldom follows intoxication. And a repetition 

 of the stimulus sometimes becomes necessary even to induce its 

 natural action, as in dram-drinkers. 



Where there has been no previous exhaustion of sensorial 

 power, and the primary link of associate motions is violently ac- 

 tuated by the sensorial power of sensation, the secondary link is 

 also violently actuated by direct sympathy; as in inflammatory 

 fevers. Where, however, the sensorial power of the system is 

 less than natural, the secondary link of associated motions be- 

 comes torpid by reverse sympathy, as in the inoculated small-pox 

 during the eruption on the face the feet are frequently cold. 



O. Associations affected four Ways. 



Hence associated trains or circles of motions may be affected 

 four different ways. L By the greater or less energy of action 

 of the first link with which they are catenated, and from which 

 they take their names; as irritative, sensitive, or voluntary asso- 

 ciations. 2. By being excited by two or more sensorial powers 

 at the same time, as by irritation and association, as in the in- 

 stance of the application of the stimulus of increased external 

 heat to the cutaneous capillaries. 3. By catenation with other 



