476 THlbRY OF FEVER. SUP. I. 1 1. 3. 



taneous and pulmonary glands aft with greater energy by their 

 reverfe fympathy with thofe of the ftomach, and of the heart 

 and arteries ; and great heat is produced along with increafed 

 perfpiration both from the flcin and lungs. 



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

 the extenfive fyftem of capillary glands, which exift on every 

 other membrane and cell in the body for the purpofe of fecreting 

 mucus and perfpirable matter, fliould fo generally act by reverfe 

 fympathy with thofe of the ftomach and upper part of the in- 

 teftines. It was (hewn in Clafs IV. i. 1.6. that when the ftom- 

 ach was filled with folid and fluid aliment, the abforbents of the 

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

 with lefs energy ; as the fluids, they were ufed to abforb and 

 tranfmit into the circulation, were now lefs wanted ; and that 

 hence by habit a reverfe fympathy obtained between thefe 

 branches of the abforbents of the alimentary canal, and thofe of 

 the other parts of the body. 



Now, as at this time lefs fluid was abforbed by the cutane- 

 ous ^and cellular lymphatics, it would happen, that lefs would 

 be fecreted by their correfpondent fecerning veflels, or capillary 

 glands ; and that hence by habit, thefe fecerning veflels would 

 acquire a reverfe fympathy of action with the fecerning veflels 

 of the alimentary canal. 



Thus when the abforption of the tears by the puncta lacry- 

 malia is much increafed by the ftimulus of fnufF; or of an af- 

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

 2. a great increafe of the fecretion of tears from the lacrymal 

 glands is produced by the direct fympathy of the action of thefe 

 glands with thofe of their correfpondent abforbents ; and that 

 though in this cafe they are placed at fo great a diflance from 

 each other. 



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

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

 teries become at the fame time more frequent ; which alfo fome- 

 times occurs in chlorofis, and in fome hyfteric and hypochon- 

 driac difeafes, and in fome infanitie$ ; yet at other times the 

 weak pulfe becomes at the fame time flow, as in the exhibition 

 of digitalis, and in parefis irritativa, defcribed in Clafs I. 2. i. 2. 

 which may be termed a fever with flow pulfe ? this frequency 

 of pulfe cannot depend on heat, becaufe it fometimes exifts 

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



Now as apoplexies, which are fometimes afcribed to fulnefs 

 of blood, are attended with flow pulfe ; and as in animals dy- 

 ing in the flaughter-houie from deficiency of blood the pulfe be- 

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



fevers 



