* From the Department of Pædiatrics, University of Toronto.
This is the thirteenth in the series of articles on Diet and Nutrition prepared under the auspices of the Association's Committee on Nutrition. The previous articles can be found in the Journal, 1938, 38: 277, 387, 491, 586; 39: 76, 179, 280, 389, 483, 578; 1939, 40: 77, 174.