CLASS IV. 2. 4. 10. OF ASSOCIATION. 433 



urnal folar periods, or by the increafing fenfibility during fleep, 

 as mentioned in the firil fpecies of this genus. 



10. Eryftpelatis periodus. Some kinds of eryfipelas which 

 probably originate from the aflbciation of the cutaneous veflels 

 with a difeafed liver, occur'- at monthly periods, like the hssmor- 

 rhois or piles ; and others at annual periods, like the gout ; as a 

 torpor of fome part I fuppofe always precedes the eryfipelatous 

 inflammation, the periods fhould accord with the increafing in- 

 fluence of terrene gravitation, as defcribed in the introduction to 

 this Genus, and in fpecies the feventh of it. Other periods of 

 difeafes referable to folar and lunar influence are mentioned in 

 Section XXXVI. and many others will probably be difcovered 

 by future obfervation. 



11. Febrtum periodus. Periods of fevers. The commence- 

 ment of the cold- 'fits of intermittent fevers, and the daily exa- 

 cerbations of other fevers, fo regularly recur at diurnal folar or 

 lunar periods, that it is impoffible to deny their connection with 

 gravitation ; as explained in Seel, XXXVI. 3. Not only thefe 

 exacerbations of fever, and their remiflions, and the diurnal fo- 

 lar and lunar periods ; but the preparatory circumftances, which 

 introduce fevers, or which determine their crififes, appear to be 

 governed by the parts of monthly lunar periods, and of folar 

 annual ones. Thus the variolous fever in the natural fmall- 

 pox commences on the I4th day, and in the inoculated fmall- 

 pox on the feventh day. The fever and etuption in the diftinct 

 kind take up another quarter of a lunation, and the maturation 

 another quarter. 



The fever, which is termed canine madnefs or hydrophobia, 

 is believed to commence near the new or full moon ; and, if the 

 caufe is not then great enough to bring on the difeafe, it feems 

 to acquire fome ftrength, or to lie dormant, till another, or per- 

 haps more powerful lunation calls it into action. In the fpring, 

 about three or four years ago, a mad dog very much worried one 

 fwine confined in a fly, and bit another in the fame ity in a lefs 

 degree ; the former became mad, refufed his meat, was much 

 convulfed, and died in about four days ; this difeafe commenced 

 about a month after the bite. The other fwine began to be ill 

 about a month after the firft, and died in the fame manner, 



VOL, II. H H h ORDO 



