6 REMARKABLE EFFECTS OF SOL-LUNAR 



and perfect, produces paroxysms every twelve 

 hours in coincidence with the periods of the tides*; 

 and constitutes types, which, on account of this re- 

 gular coincidence, I have denominated ptrject. 



Of Impeyfict Types. 



The diurnal and nocturnal increase of sol-lunar 

 power acting on constitutions in which the pro- 

 pensity to paroxysm is incomplete or imperfect, 

 has power only to produce paroxysms in coinci- 

 dence with every second, third, or fourth period 

 of the tides, or others more remote ; constituting 

 types, which, on account of this irregular coinci- 

 dence, 1 have called imperfect. 



By the discovery of this simple and universal 

 principle, we are ahie to unfold the whole mystery 

 of types; and to explain all the diversities that 

 have appeared under the distinctions of continued, 

 remittmg, vrnd intermit ti/ig fevers. Fevers, hither- 

 to denominated continued fevers, and supposed 

 from the obscurity of their remissions to have none, 

 are all of them to be considered as nothing else 

 than fevers of a perfect type, in which two daily 

 remissions may always be discovered, by attending 

 to the remissions of sol-lunar influence, especially 

 those of the morning ; and fevers having pa- 

 roxysms every twelve hours with obvious remis- 

 sions, whether denominated continued or remit- 

 ting fevers, are also evidently fevers of a perfect 

 type. 



* I express myself iu this manner for the sake of brevity, niean- 

 ing Ihat tlio paroxysms occur in coincidence with the positions of 

 the sun and moon that occasion llie tides. The tides, it is well 

 known, do not coincide with tho^c exactly, but follow them a cou- 

 sideiuble time after. 



