



Class II. i. 6. i. OF SENSATION. 24* 



ORDO I. 



Increafed Senfatlon. 



GENUS VI. 



JF/M Fever confequent to the Production cf new Veffels cf Fluid:, 



SPECIES. 



1. Fehrtsfenfitiva. SenGtive fever, when unmixed with either 

 irritative or inirritative fever, may be dircinguiftied from either 

 of them by the lefs comparative diminution of mufcular ftrength;' 

 or in other words, from its beincr attended with lefs diminution 

 of the fenforial power of irritation". An example of unmixed 

 fenfitive fever may generally be taken from" the pulmonary con- 

 fumption ; in this difeafe patients are feen to walk about with 

 eafe, and to do ail the common offices of life for weeks, and even 

 months, with a pulfe of 120 strokes in a minute -, while in other 

 fevers, whether irritated or inirritated, with a pulfe of this fre- 

 quency, the patient generally lies upon the bed and exerts no 

 mufcular efforts without difficulty. 



The caufe cf this curious phenomenon is thus to' be under- 

 flood ; in the fenfitive fever a new fenforial power, viz. that of 

 fenfation, is fuperaddedto that of irritation ;• which in other fevers 

 alone carries en the increafed circulation. Whence the power 

 of irritation is not much more exhauiied than in health ; and 

 thofe mufcular motions, which are produced in confi^juence of 

 it, as thofe which are exerted in keeping the body upright in 

 ■walking, riding, and in the performance of many cuilo'inary ac- 

 tions, are little impaired. For an account of the irritated fenfi- 

 tive fever, fee Oafs II. 1. 2. 1. ; for' the inirritated ieniidve fever, 

 Clafs II. 1. 3. 1. IV. 2. 4. 11. 



2. Febris a pure cldufo. Fever from enclofed matter is gener- 

 ally of the irritated fenfitive kind, and continues for many weeks, 

 and even months, after the abfeefs is formed •, but is diftinguifh- 

 ed from the fever from aerated matter in open ulcers, becaufe 

 there are feldom any night-fweats, or colliquative diarrhoea in 

 this, as in the latter. The pulfe is alfo harder, and requires oc- 

 cafional venefeclion, and cathartics, to abate the inflammatory 

 fever ; which is liable to increafe again every three or four days, 

 till at length, unlefs the matter his an exit, it deftroys th :nt. 

 In this fever the matter, not having been expofed to the air, has 

 not acquired oxygenation ; in which a ne\y acid, or fame other 



Vol. II, II n: r* 



