THIS issue of Pediatrics contains a description of the role of trace elements in hemopoiesis, a critical study which was presented at the annual meeting of the American Academy of Pediatrics held in Chicago in early October, 1955. James Allen Bush, the author, although not actually a Fellow of the Academy, made the presentation at the invitation of the Program Committee. He imbued his message with a rare combination of enthusiasm, clear thinking, mature judgment and a fine appreciation of the true goals of clinical investigation. Those who heard him in Chicago could not fail to be impressed by the sincerity of his search for truth.