In the article by Dr. George M. Guest entitled "Organic Phosphates of the Blood and Mineral Metabolism in Diabetic Acidosis," in the September issue (Am. J. Drs. Child.64:401, 1942), three errors occurred: In the diagram at the bottom of page 402, the left of the lower pair of arrows should point up instead of down. In the last line of the legend for chart 4, on page 407, the chart numbers should be 2 and 3. The third line from the bottom of page 408 should begin "the carbon dioxide content and the ph of the blood."