3-1$ DISEASES CLASS II. i. g. $. 



feclion, gentle repeated cathartics. Laftly, the bark. Acid of 

 vitriol. Bolus Armenia, or teftacea. Aritimonials. Decoc- 

 tion of interior bark of elm: 



9. Zona ignea. Shingles. This eruption has been thought a- 

 fpecies of herpes by ibme writers, and by others a fpeeies of 

 eryfipelas. Yellow or livid veficles appear, producing a corrofive 

 ichor, which is fomedmes attended with a degree of fever. It 

 is faid to infeft fometimes the thorax an'd ribs, but its' moft gen- 

 eral fituation is on the fmall of the back, over one kidney, extend- 

 ing forward over the courfe of one of the ureters. 



There is reafon to fufpecl, that this alfo is a fecondary or fym- 

 pathetic difeafe, as well as the preceding one ; but future 

 obfervations are required, before it can be removed to the fourth 

 clafs, or difeafes of affociation. In three patients I have been- 

 induced to believe, that the eruption on the*loi'ns was a tranila- 

 tron of inflammation from the external membrane of the kidney 

 to the fkin. They had, for a day or two before the appearance 

 of the eruption, complained of a dull pain on the region of one 

 kidney, but without vomiting ; by which it was diftinguifhed 

 from nephritis interna, or gravel ; and without pain down the 

 outfide of the thigh, by which it was diftinguifhed from fciatica* 

 In other fituations the fhingles may fympathize with other inter- 

 nal membranes, as in a cafe publifhed by Dr. Ruflel (De Tabe 

 Glandulari), where the retroceflion of the ihingles was fucceed- 

 ed by a ferious dyfpnoca.- 



M. M. Venefeclion, if the priilfe is flrong. Calomel three or 

 four grains, very mild repeated cathartics. Poultice for a few 

 days, then cerate of lapis calaminaris, 'as in herpes. A grain of 

 emetic tartar diffolved in a pint of water, and taken fo as to emp- 

 ty the ftomach and inteftines, is faid much to haften the cure ; 

 compreffes foaked in a faturnine folution are recommended ex- 

 ternally onthe eruption ; and cerate where there are ulcerations. 

 Defanet^s Surgical Journal, Vol. II. p. 378. If this be a vicari- 

 ous difeafe, it iliould continue half a lunation ; left, on its ceaf- 

 ing, the bad habits of motion of the primary difeafe fliouid not 

 have been fo perfectly diflevered, but that they may recur. 



10. Annulus repens. Ring- worm. A prurient eruption 

 formed in a circle, affecting children, and would feem to be the 

 work of infects, according to the theory of Linnaeus, who afcribes' 

 the itch and dyfenterv to microfcopic animalcula. Thefe ani- 

 malcula are probably the effect, and n6t the cau fe, of thefe erup- 

 tions ; as they are to be feen in all putrefcent animal fluids. The 

 annular propagation of the ring-worm, and its continuing to en- 

 large its periphery, is well accounted for by the acrimony of the' 

 ichor or faiine fluid eroding the ikin in its vicinity. 



M. M. Cove? 



