The patient, a male child 11 months of age, of English parentage, was presented for treatment at St. Joseph's Hospital on May 10, 1899.
—His father and mother are living and in good health, and there are eight other children all of whom have been entirely free from a rash of the character hereafter described. The father and mother have never suffered from a rash of any kind, with the exception of prickly heat, and both seem to present a history free from specific disease.
—The child was born at the eighth month of gestation, there being a hard, dry labor, and version was done. The patient has been fed on the breast, has never suffered from a rash or disease of any variety until he had the chicken-pox when 3 months of age. At the time he became ill of this latter disease an epidemic