33 DISEASES Class II. i. r. ${ 



fe£tion, gentle repeated cathartics. Laftly, the bark. Acid of. 

 vitriol. Bolus Armenia, or teftacea. Antimonials. Decoc^ 

 tion of interior bark of elm. 



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

 fpecies of herpes by fome writers, and by others a fpecies of 

 eryfipelas. Yellow or livid veficles appear, producing a corrofive 

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

 is faid to infeft fometimes the thorax and ribs, but its moll: 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 fufpett, 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 

 clafsy or difeafes of aiTociation. In three patients I have beeri 

 induced to believe, that the eruption on the loins was a transla- 

 tion 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 vas diftinguiihted from fciatica. 

 In other (ituations the (hingles may fympfathize with other inter- 

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

 Glandulari), where the retroceffion of the mingles was fucceed<* 

 ed by a ferious dyfpncea. 



M. M. Venefeclion, if the pulfe is ftrong. Calomel three oi* 

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

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

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

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

 comprefTes foaked in a faturnine folution are recommended ex- 

 ternally on the eruption ; and cerate where there are ulcerations* 

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

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

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

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



10. Amiulus 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 Linnseus, who afcribes; 

 the itch and dyfentery to microfcopic animalcula. Thefe ani- 

 malcula are probably the effect, and not 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 faline fluid eroding the fkin in its vicinity. 



M. M. Cover 



