SfiCT.X3fXlI.9- DISEASES OF IRRITAf ION. 437 



minifhed, but we are more liable to coldnefs of 

 our extremities, as of our nofes, and cars, and 

 feet, than at other times. 



Now, as fear is originally excited by our hav- 

 ing experienced pain, and is itfelf a painful affec- 

 tion, the fame quieicence of other fibrous motions 

 Accompany it, as have been mod frequently con- 

 nected with this kind of pain, as explained in 

 Seel. XVI. 8 i. as the coldnefs and palenefs of 

 the ikin, trembling, difficult refpiration, indigef- 

 tion, and other fymptoms, which contribute to 

 form the cold fit of fevers. Anxiety is fear con- 

 tinued through a longer time, and, by producing 

 chronical torpor of the fyftem, extinguimes life 

 /lowly, by what is commonly termed a broken heart. 

 IX. I. We now Hep forwards to coniider the 

 other fymptoms in confequenpe of the quicfcence 

 which begins the fits of fever. If by any of the 

 circumftances before defcribed, or by two or more 

 of them a6ling at the fame time, a great degree 

 of quiefcence is induced on any confiderable part 

 of the circle pf irritative motions, the whole clafs 

 of them is more or lefs cjifturbed by their irrita- 

 tive aflfociations. If this torpor be occafioned by 

 a deficient fupply of fenforial power, and happens 

 to any of thofe parts of the fyftem, which are ac- 

 cuftomecj to perpetual a&ivity, as the vital motions, 

 the torpor ihcreafes rapidly, becaufe of the -great ex- 

 penditurp of fenforial power by the in ceilant acti- 

 vity ' pf T t)iofe ' parts of the fyilem, as fhewn in 

 No. 3-2. of this Sedlion. Hence a deficiency of 

 all the fecretions facceeds, and as animal heat is 

 produced in proportion to the quantity of thofe 

 fecretions, the coldnefs of the fkin is the firft 

 circumdance, which is attended to. Dr. Martin 

 aliens, that fome parts of his body were warmer 

 than natural in the cold fit of fever ; but it is 

 certain, that thofe which are uncovered, as the 

 fingers, and nofe, and ears, are much colder to 

 the touch, and paler in appearance. It is pofli- 



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