Caption

Skin disorders. Historical medical illustration showing skin disorders in four patients. Fig.1: Seborrhoea sicca; the over-production of skin cells forming dry scales. Fig.2: Comedo; blocked hair follicles resulting in blackheads. Fig.3: Milium; cysts resulting from blocked sweat glands. Fig.4: Sudamina (miliaria crystallina); heat rash caused by blocked sweat glands. From Atlas of Venereal and Skin Diseases by Prince Albert Morrow, published in 1889.