A practical treatise on porrigo, or scalled head, and on impetigo, the humid or running tetter : with coloured engravings illustrative of the diseases / by Robert Willan ; edited by Ashby Smith.

Date:
1814
Catalogue details

Licence: Public Domain Mark

Credit: A practical treatise on porrigo, or scalled head, and on impetigo, the humid or running tetter : with coloured engravings illustrative of the diseases / by Robert Willan ; edited by Ashby Smith. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    45/74 (page 33)
    ON IMPETIGO; THE HUMID OR RUNNING TETTER. ]By the term IMPETIGO, I mean to express an eruption of the pustules usually denominated Psydracia. The Psy- dracium is a minute pustule, and irregularly circumscribed, producing but a slight elevation of the cuticle, and termi- nating in a laminated scab. Many of these pustules usually appear together, and become confluent. When mature, they contain pus; and after breaking, discharge a thin watery humour. The definition of Psydracion by Greek authors, is con- formable to that given above. Alexander Trallianus and Paulus iEgiiieta, represent Psydracia as small elevations of the cuticle, resembling Phlyctides, and chiefly confined to the head but according to Galen, they appear on everv part * V!Ti^aya.i, (pXiixIiS’in I'irt^anna.e. Alex. Trail, lib. i. cap. 5. Paul. iEg. lib. iii. cap. 3. £5-1 ynttuf >.£y'jjj,tyon o ‘Trav'lo crajj-a, to ts o<p6aXfj.ii yitelai, cfoy e| cfivicf. Galen. Introductio, cap. 15, F