Correction to 1969 index

Eentries for two letters appearing in the November issue were omitted: Gronson, Harry M.; An impulse scattering range (Ltr.); Gagnon, Ralph J.; PROC 69 Nov 2093-2094, PROC 69 Nov 2094. Further comments, with author’s reply, on Grimes, D.M. ; The acceleration magnetic field of a steadycurrent loop (Ltr.); PROC 68 Sep 1592-1593. The author index entry for the 1968 letter by D.M. Grimes should have appeared as follows: Grimes, D.M. ; The acceleration magnetic field of a steadycurrent loop (Ltr.); PROC 68 Sep 1592-1593. Comments by Ralph J. Gagnon, and author’s reply, PROC 69 Feb 242-244. Further comments by Ralph G. Gagnon, and author’s reply, PROC 69 Nov 2093-2094.