530 PRACTICE OF PHYSIC. 



vages. What we call the principal fit, as that on the Monday 

 and Wednesday, and so on every other day, comes on about 

 twelve o'clock at noon, sometimes a little sooner, sometimes a 

 little later ; it is never much earlier, however, without putting 

 on the Quotidian form, nor much later without assuming the 

 appearance of a Quartan ; and this paroxysm is as much con- 

 nected with noon as the character is with forty-eight hours ; it 

 is attended with horror and tremor, and has its solution with a 

 copious sweat ; it goes off for the most part about eight o'clock 

 in the evening, or a little sooner ; the other paroxysm goes off 

 about six o'clock, or even later, and is accompanied with less 

 horror and tremor, and with less sweat in its solution. A second 

 form is the ' Tertiana alternis diebus revertens, paroxysmis eo- 

 dem die binis.' This, like the proper tertian, comes only every 

 other day, but the fit occurs twice upon the same day ; hence 

 it is called ' Tertiana duplicata ;' but it is of very rare and un- 

 common appearance, and is mentioned only as an addition to the 

 history of fever. The third variety, which is defined ' Tertiana 

 quotidie revertens, paroxysmis altero die binis, altero unico 

 tantum,' differs from the former two in the following circum- 

 stances : It has a paroxysm every day, hi which it agrees with 

 the ' Tertiana duplex,' and the single paroxysm is precisely 

 in the circumstances of the double tertian ; but it differs from 

 it in having two paroxysms on one of the days, in which it is 

 like the c Tertiana duplicata.' These Tertians, by their doubling 

 in their recurrence, come nearer and nearer to the remittent form. 

 They have been named by practitioners, Semitertians ; but I 

 give you a name which is more easily understood, the ' Ter- 

 tiana triplex.' The fourth variety is thus defined : * Tertiana 

 quotidie revertens, interposita remissione inter diem imparem et 

 parem magis, inter parem et imparem minus, notabili.' I shall 

 explain this variety by marking the days of the week, as Cleg- 

 horn endeavours to do ; but I hope to do it more clearly. Sup- 

 pose a patient affected with a Tertian whose paroxysm recurs 

 on Monday at noon ; he has remission towards the evening, and 

 on the same evening there is a new exacerbation ; next day the 

 patient is free from fever till the evening, when a new fit comes 

 on, which has its intermission and remission again on the Wed- 

 nesday morning ; but the same course returns, he has a fit on 



