Proper positioning of supplies in the autoclave is essential to effective sterilization. Its importance is frequently emphasized by authorities on sterilization.As a service to our readers, we are reprinting here an excellent article on this subject, which originally appeared in the September, 1956, issue of HOSPITAL TOPICS and is also included in the CENTRAL SUPPLY YEARBOOK, Volume II. The principles which it presents have not changed, and we believe the material is well worth reviewing, particularly for the benefit of new personnel in the field.—THE EDITORS.