Correspondence [Low-Level Atmospheric Ducts & Radar Reflections from the Lower Atmosphere]

Presents two sets of comments on previously published articles. J.S. McPetrie and B.J. Starnecki comment on the work of M. Katzin, R. Bauchman, and W. Binnian: "13- and 9-centimeter propagation in low ocean ducts" (ibid., vol. 35, pp. 891-906, September, 1947). Millard W. Baldwin, Jr. comments on the work of W.B. Gould, \´Radar reflections from the lower atmosphere" (ibid., vol. 35, p. 1105, October, 1947).