FEVERS. 519 



changes to a paler wheyish colour, and sometimes it has the 

 red colour. But the most considerable difference between the 

 two forms is, c sensorii functiones parum turbatae' in synocha ; 

 and ' plurimum turbatae" in typhus. Delirium does accompany 

 the inflammatory fever very frequently, as well as the typhus ; 

 but in general the functions of the sensorium are both soon and 

 considerably affected in the latter. If I could give in proper terms 

 the characters of the two different deliriums^ the/eroo? and mite, I 

 would make such a distinction : (See Physiology, page 148.) The 

 furious phrenitic delirium which depends upon the increased 

 impetus of the blood, attends the synocha ; whereas typhus is 

 generally accompanied by the mild calm delirium which is with- 

 out any thing furious or impetuous, but often appears by the 

 patient muttering to himself in an incoherent manner, and some- 

 tunes becomes more considerable, so that he loses attention to 

 every thing about him, but is without much ferocity of phren- 

 itic appearance. But this difference is not sufficiently esta- 

 blished in our Pathology, and there is nothing steady in this 

 respect, as in typhus also the delirium is sometimes phrenitic. 

 I have therefore only said, that the functions of the sensorium 

 or nervous system are more considerably altered and disturbed 

 in the nervous than they are in the inflammatory fever. I 

 have added in the character of typhus, c vires multum imminu- 

 tae, 1 as the prostration of strength is more considerable in this 

 genus. In synocha a debility occurs to a certain extent, but 

 it never appears so early as in the former case."" 



LXVIII. By these characters I think continued fevers may 

 in practice be distinguished ; and if that be the case, the prin- 

 ciples above laid down will be confirmed. 



" Now this is the principal distinction of continued fevers, 

 into the inflammatory and nervous ; it is now some time since 

 physicians have agreed in it, and I hope I have explained it in 

 a consistency with our general system. But I have only 

 given you what I call a theoretical idea of these fevers, where- 

 fore it will be proper now to give you a series of facts, that we 

 may take care to keep in view what happens in nature. I pro- 

 ceed, therefore, to point out in what manner these two cases of 

 fever may be distinguished by their external symptoms. This 

 is very different from the definition, in which we select the chief 



