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CLASSIFICATION. 



Order L Exanthkmaja. Pityriasia. 



Erythema. Ichthyosia. 



Koseola. 



Urticaria. ^^^^^ ^^ Tuberculj!. 



Lepra Tuberculosa. 

 Obdj«r IL Vesioulje. Lupus. 



Eci-ema. MoUuscum. 



Herpe's. 



Scabies. Obdeb VIL Macuub. 



Pemphigua. Lentigo. 



EphelideR. ) 

 Obdeb IIL PL-siCLa: NaevL 



Lnpotigo. Purpura. 



, Eothyma. 



^jjjjg Order VIIL Debmatozoa. 



Uupia, Entozoon. folliculorum, 



Acarus. 

 Obdeb IT. Papuls: Pediculua. 



Lichen. 

 Prurigo. Obdeb IX. Debmatophtta, 



Achorion SchOnlciniL 

 Order V. Squam-e. ^^ Gr^tiL 



Paoriaaia. (Mentagra.) 



Objeotion is taken to these forms of classification upon the 

 grounds that they are mainly anatomical, and that they throw 

 DO light on the causes, the pathology, or the treatment of the 

 various diseases. "Febrile diseases are associated with the 

 non-febrile, and local and trivial ailments are associated with, 

 those of grave import. They entirely overlook the circum- 

 etanco that what may be papular to-day may be vesicular to- 

 morrow, and pustular eventually. And, on the other hand, 

 distempers which nature has plainly brought together, and 

 connected by striking analogies and resemblances, are by these 

 arrangementa put widely asunder." — (Watson.) 



The late Dr. Buchanan, of Glasgow, in a paper "On the 

 Theory and Cla'^3ification of Inflammation of the Skin," says 

 til at skin diseaaes, like all other diseases, ought to be classified 

 accoixlin*; \o their nature or pathology ; but when the cause is 

 unknown, eome oiher principles must be sought for, under 

 which groups may be formed ; and he finds that in the patho-' 

 logical processes recognised as injlammations, new /ormaiionSf] 



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