lg6 DISEASES Sect. XXXII. 8. «* 



al caufe of their quiefcence feems to be too great infipidity of 

 the fluids of the body, co-operating perhaps at the fame time 

 with other general caufes of quiefcence. 



Hence, in marfhy countries at cold feafons, which have fuc- 

 ceeded hot ones, and amongft thofe, who have lived on innutri- 

 tious and unftimulating diet, thefe agues are mod frequent. 

 The enlargement of thefe quiefcent vifcera, and the fwelling of 

 the pnecordia in many other fevers, is, molt probably, owing to 

 the fame caufe j which may confift in a general deficiency of 

 the production of fenlbrial power, as well as in the diminifned 

 ftimulation of the fluids ; and when the quiefcence of fo great 

 a number of glands, as conttitute one of thofe large vifcera, 

 commences, all the other irritative motions are affected by their 

 connexion with it, and the cold fit of fever is produced. 



VIII. There are many other caufes, which produce quiefcence 

 of fome part of the animal fyftem, as fatigue, hunger, thirft, bad 

 diet, difappointed love, unwholefome air, exhauftion from evacu- 

 ations, and many others ; but the Lift caufe, that we ihall men- 

 tion, as frequently productive of cold fits of fever, is fear or 

 anxiety of mind. The pains, which we are firft and moft gen- 

 erally acquainted with, have been produced by defect of fome 

 ltimulus 5 thus, foon after our nativity we become acquainted 

 with the pain from the coldnefs of the air, from the want of 

 refpiration, and from the want of food. Now all thefe pains 

 occafioned by defect of ftimulus are attended with quiefcence of 

 the organ, and at the fame time with a greater or lefs degree of 

 quiefcence of other parts of the fyftem : thus, if we even en- 

 dure the pain of hunger fo as to mifs one meal inflead of our 

 daily habit of repletion, not only the periftaltic motions of the 

 ftomach and bowels are diminifhed, but we are more liable to 

 coldnefs of our extremities, as of our nofes, and ears, and feet, 

 than at other times. 



Now, as fear is originally excited by our having experienced 

 pain, and is itfelf a painful affection, the fame quiefcence of 

 other fibrous motions accompanies it, as has been moft frequent- 

 ly connected with this kind of pain, as explained in Sect. XVI. 

 8. I. as the coldnefs and palenefs of the fkin, trembling, difficult 

 refpiration, indigestion, and other fymptoms, which contribute 

 to form the cold fit of fevers. Anxiety is fear continued through 

 a Longer lime, and, by producing chronical torpor of the fyftem, 

 extinguifh.es life Howly, by what is commonly termed a broken 

 I rt. 



IX. i. V/e now ftep forwards to confider the other fymp- 

 toms in confequence of the quiefcence which begins the fits of 

 fever. If by any of the circumftances before defcribed, or by 



fw* 



