Icterus Neonatorum *Read 10th May 1922.

The occurrence of jaundice in the newborn is so frequent and the theories put forward to explain it so various, that the following observations were made in the hope of throwing further light on the subject. Number of Infants Examined.?Over 300 infants (337) were studied. The total number was composed of two large series of consecutive births. No blood tests were made for syphilis, reliance being placed upon the absence of any clinical evidence of the disease in either the mother or child. It was not possible to make a post-mortem examination on the five children (all under 5 lbs.) who died jaundiced. (1) Number Jaundiced (all weights).?68 per cent, were jaundiced. This varied considerably in degree. In mild cases it consisted of a sallow appearance of the face, lasting about twenty-four hours, which was quite distinct from the pink colour present at birth or which succeeded it. In severe cases,