Correction [to "Evaluation of a simple computer for cardiac output measurements based on thermal dilution"]

J.S. Ford has called the following to the attention of the Editor. In "Evaluation of a Simple Computer for Cardiac Output Measurements Based on Thermal Dilution," by H.U. Wessel, J.E. Jacobs, 0.D. Despe, and P. Kezdi, which appeared on pages 155-159 of the April, 1962, issue of these Transactions: On page 157, the last term of the formula A = 1/2((Yo + Yn)) + Y1 + Y2 + ... + Yn-1 should read Y_n-1. The formula is the Trapezoidal Rule according to "Reference Data for Radio Engineers," page 1033, instead of Simpson\´s Rule.