306 DISEASES SECT. XXXIII. 1.2, 



tin&ion to the tedium vit?c. This quantity or fum of pleafura- 

 ble affection feems to contribute to the due or energetic per- 

 formance of the whole moveable fyftem, as well that of the heart 

 and arteries, as of digeflion and of abforp^ion *, fince without 

 the due quantity of pleafurable fenfation, flatulency and hypo- 

 chondriacifm affects the inteftines, and a languor feizes the arte- 

 rial pulfations and fecretions ; as occurs in great and continued 

 anxiety of the mind. 



2. Befides the febrile motions occauoned by irritation, de- 

 fcribed in Seel. XXXII. and termed irritative fever, it frequent- 

 ly happens that pain is excited by the violence of the fibrous 

 contractions ; and other new motions are then fuperadded, in 

 confequence of fenfation, which we {hall term febris fenfitiva, 

 or fenfitive fever. It mud be obferved, that moft irritative fe- 

 vers begin with a decreafed exertion of irritation owing to de- 

 fed! of (limulus ; but that on the contrary the fenfitive fevers 

 or inflammations, generally begin with the increafed exertion of 

 fenfation, as mentioned in Seel. XXXI on temperaments : for 

 though the cold fit, which introduces inflammation, commences 

 with decreafed irritation, yet the inflammation itfelf commences 

 in the hot fit during the increafe of fenfation. Thus a common 

 puflule, or phlegmon, in a part of little fenfibiiity does not ex- 

 cite an inflammatory fever ; but if the ftomach, inteftines, or 

 the tender fubftance beneath the nails, be injured, great fenfa- 

 tion is produced, and the whole fyltem is thrown into that kind 

 of exertion, which conftitutes inflammation. 



Thefe fenfitive fevers, like the irritative ones, refolve.them- 

 felves into thofe with arterial ftrength, and thofe with arterial 

 debility, that is with excefs or defect of fenforial power ; thefe 

 may be termed the febris fenfitiva pulfu forti, fenfitive fever 

 with ftrong pulfe, which is the fynocha, or inflammatory fever ; 

 and the febris fenfitiva pulfu debili, fenfitive fever with weak 

 puife, which is the typhus gravior, or putrid fever of fome 

 writers 



3. The inflammatory fevers, which are here termed fenfitive 

 fevers with ftrong pulfe, are generally attended with fome topical 

 inflammation, as pleurify, peripneumony, or rheumatifm, which 

 diftinguifhes them from irritative fevers with ftrong pulfe. The 

 pulfe is ftrong, quick, and full , for in this fever there is great 

 irritation, as well as great fenfation, employed in moving the 

 arterial fyftem. The fize, or coagulabte lymph, which appears 

 on the blood, is probably an increafed fecretion from the in- 

 flamed internal lining of the whole arterial fyftem, the thinner 

 part being taken away by the increafed abforption of the in- 

 flamed lymphatics. 



The 



