476 THEORY OF FEVER. SUP.. I. 11.3. 



taneous and pulmonary glands act with greater energy by their 

 reverse sympathy with those of the stomach, and of the heart 

 and arteries; and great heat is produced along with increased 

 perspiration both from the skin and lungs. 



3. There is some difficulty in explaining, why the actions of 

 the extensive system of capillary glands, which exist on every 

 other membrane and cell in the body for the purpose of secreting 

 mucus and perspirable matter, should so generally act by reverse 

 sympathy with those of the stomach and upper part of the in- 

 testines. It was shewn in Class IV. 1. 1. 6. that when the sto- 

 mach was filled with solid and fluid aliment, the absorbents of 

 the cellular membrane, and of the bladder, and of the skin, acted 

 with less energy; as the fluids, they were used to absorb and 

 transmit into the circulation, were now less wanted; and that 

 hence by habit a reverse sympathy obtained between these 

 branches of the absorbents of the alimentary canal, and those of 

 the other parts of the body. 



Now, as at this time less fluid was absorbed by the cutane- 

 ous and cellular lymphatics, it would happen, that less would be 

 secreted by their correspondent secerning vessels, or capillary 

 glands; and that hence by habit these secerning vessels would 

 acquire a reverse sympathy of action with the secerning vessels 

 of the alimentary canal. 



Thus when the absorption of the tears by the puncta lachry- 

 nialia is much increased by the stimulus of snuff; or of an af- 

 fecting idea, on the nasal ducts, as explained in Sect. XVI. 8. 

 2. a great increase of the secretion of tears from the lachrymal 

 glands is produced by the direct sympathy of the action of these 

 glands with those of their correspondent absorbents; and that 

 though in this case they are placed at so great a distance from 

 each other. 



4. A difficult question here occurs; why does it happen, that 

 in fevers with weak pulse the contractions of the heart and ar- 

 teries become at the same time more frequent; which also some- 

 times occurs in chlorosis, and in some hysteric and hypochon- 

 driac diseases, and in some insanities; yet at other times the 

 weak pulse becomes at the same time slow, as in the exhibition 

 of digitalis, and in paresis irritativa, described in Class I. 2. 1. 2. 

 which may be termed a fever with slow pulse? this frequency 

 of pulse cannot depend upon heat, because it sometimes exists 

 without heat, as towards the end of some fevers with debility. 



Now as apoplexies, which are sometimes ascribed to fulness 

 of blood, are attended with slow pulse; and as in animals dying 

 in the slaughter-house from deficiency of blood the pulse be- 

 comes frequent in extreme; may not the frequency of pulse in 



