rfi DISEASES Class HI. u i, t; 



twofold meanings, or by the inaccuracy of the ideas, which they 

 fuggeft. 



SPECIES. 



i. JtiFritai'tQ. Reftlefihefs. There is one kind of reftlefihefs. 

 attending fevers, which confifts in a frequent change of pofture 

 to relieve the uneaiinefs of the preflure of one part of the body 

 upon another, when the fenfibility of the fyftem, or of fome 

 parts of it, is increafed by inflammation, as in the lumbago \ 

 which may fometimes be diftinguiihed in its early ftage by the 

 inceflant defire of the patient to turn himfelf in bed. But there 

 is another reftlefihefs, which approaches towards writhing or 

 contortions of the body, which is a voluntary effort to relieve 

 pain ; and may be efteemed a (lighter kind of convulfion, not 

 totally unreftrainable by oppofite or counteracting volitions. 

 • Thus when a fquirrel is confined in a cage, he feels uneafi* 

 nefs from the accumulation of fenforial power, in his mufcles, 

 which were before in continual violent exertion in his habits. 

 of life ; and in this fituation finds relief by perpetually jump? 

 ing about his cage to expend a part of this accumulated fenfo- 

 rial power. 



For the fame reafon thofe children, who are conftrained to fit 

 in fome fchools for hours together, are liable to acquire habits of 

 moving fome mufcles of their faces, or hands, or feet, which are 

 called tricks, to exhauft a part of the accumulated fenforial pow- 

 er. Hence reftlefihefs is occafioned by increafe of ftimulus, or 

 by accumulation of fenforial power. 



M. M. A bliiter. Opium. Warm bath. Bandage or; 

 the moving mufcles. See Cor\vulfio debilis, Clafs HI. i. i. 5, 

 exercife. 



. 2. Tremor febrilis. Reciprocal convulfions of the fubcu- 

 taneous mufcles, originating from the pain of the fenfe of 

 heat, owing to defect: of its ufual ftimulus, and confequent 

 accumulation of fenforial power in it. The actual defi- 

 ciency of heat may exift in one part of the body, and the 

 pain of cold be felt mod vividly in fome other part aflbciated 

 with it by fenfitive iympathy. So a chilnels down the back is 

 fitft attended to in ague-fits, though the difeafe perhaps com- 

 mences with the torpor and confequent coldnefs of fome inter- 

 nal vifcus. But in whatever part of the fyftem the defect of 

 heat exifts, or the fenfation of it, the convulfions of the fubcu- 

 nneous mufcles exerted to relieve it are very general ; and, if 

 the pain is (till greater, a chattering of the teeth is added, the 



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