GLASS H. 1. 3. 1. OF SENSATION. 185 



of animal matter in some vicious kind of fermentation, Medi- 

 cal Review, Vol. III. p. 17. 



SPECIES, 



1. Febris scnsitivct inirritata. Sensitive inirritated fever. Ty- 

 phus gravior. Putrid malignant fever. Jail fever. The imme- 

 diate cause of this disease is the increase of the sensorial power 

 of sensation, joined with the decrease of the sensorial power of 

 irritation; that is, it consists in the febris sensitiva joined with the 

 febris inirritativa of Class I. 2. 1. 1. as the febris sensitiva irri- 

 tata of the preceding genus consists of the febris sensitiva joined 

 with the febris irritativa of Class I. 1. 1. 1. In both which the 

 words irritata and inirritata, are designed to express more or less 

 irritation than the natural quantity; and the same when applied 

 to some of the diseases of this genus. 



This fever is frequently accompanied with topical inflamma- 

 tion, which is liable, if the arterial strength is not supported, to 

 end in sphacelus; and as mortified parts, such as sloughs of the 

 throat, if they adhere to living parts, soon become putrid from 

 the warmth and moisture of their situation; these fevers have 

 been termed putrid, and have been thought to owe their cause to 

 what is only their consequence. In hot climates this fever is 

 frequently induced by the exhalations of stagnating lakes or 

 marshes, which abound with animal substances; but which in 

 colder countries produce fevers with debility only, as the quar- 

 tan ague, without inflammation. 



The sensitive inirritated, or malignant fever, is also frequently 

 produced by the putrid exhalations and stagnant air in prisons; 

 but perhaps most frequently by contact or near approach of the 

 persons who have resided in them. These causes of malignant 

 fevers contributed to produce, and to support for a while, the 

 septic and antiseptic theory of them; see Sect. XXXIII. 1. 3. 

 The vibices or bruises, and petechiae or purples, were believed 

 to be owing to the dissolved state of the blood by its incipient 

 putrefaction; but hydrostatical experiments have been made, 

 which shew the sizy blood of the patient in sensitive irritated or. 

 inflammatory fever, with strong pulse, is more fluid, while it is 

 warm, than this uncoagulable blood taken in this sensitive inirri- 

 tated, or malignant fever; from whence it is inferred, that these 

 petechiae, and vibices, are owing to the deficient power of absorp- 

 tion in the terminations of the veins. See Class I. 2. 1. 5. 



This sensitive inirritated fever, or typhus gravior, is distin- 

 guished from the inirritative fever, or typhus mitior, in the ear- 

 ly stages of it, by the eolour of the skirt; which in the latter is 



TOJ,. ii. B b 



