Comments on “Recommendations for standardization of instruments in electrocardiography and vectorcardiography”: Alexander, D. C., Meagher, P. H., and Weinberg, D. I. (11 Lakeview Ave., Peekskill, N.Y.) IEEE Trans. Biomed. Engr. 15: 327, 1968 Berson, A. S. (V.A. Research Center for CVPD, Washington, D.C.) and Briller, S.A. (Hosp. Univ. of Pennsylvania, Phila, Penna.) Reply. IEEE Trans. Biomed. Engr. 15: 328, 1968