Acknowledgements

Figures 23 and 24 were furnished through the courtesy of the Armco Steel Corp. Figures 50, 51, 52, 53, and 86 first appeared in a paper by O. H. Schade, Proc. I.R.E., July, 1943, p. 341. Figure 150 is reprinted from Proc. I.R.E., April, 1945. Figure 63 first appeared in the I.R.E. Transactions on Component Parts, April, 1955.

Figure 71 is reprinted from Electronics, March, 1955. Figures 89, 90, and 91 are reprinted from, and Section 52 (p. 123) is based on, "Solving a Rectifier Problem," Electronics, April, 1938. Figures 100 and 101 are reprinted from Electronics for September, 1949. Figure 180 and Section 97 (p. 232) are based on "A Study of R-F Chokes," which appeared in Electronics in April, 1934. Sections 123, 124, 125, and 127 (p. 294 et seq) are based on "iron-Core Components in Pulse Amplifiers," Electronics, August, 1943. Figures 73, 258, and 259 are reprinted from this article.

Figure 88 is reprinted from Tele-Tech and Electronic Industries, October, 1953 (copyright Caldwell-Clements, 480 Lexington Avenue, New York).

Figures 107 and 110, and part of Section 67 (p. 153), first appeared in Radio Engineering, June, 1937.

Figure 142 is reprinted from the General Radio Experimenter, November, 1936.

Figures 163, 164, and 165 are reprinted from "Magnetic Ferrites- Core Materials for High Frequencies," by C. L. Snyder, E. Albers-Schoenberg, and H. A. Goldsmith, Electrical Manufacturing, December, 1949. Figure 191 is reprinted from Electrical Manufacturing for September, 1954.

The magnetic amplifier analysis on p. 276 is based on an unpublished paper by D. Lebell and B. Bussell, presented at the I.R.E. Convention, New York, March, 1952.

Figures 235, 252, 254, and 255, and Table XVII, are reprinted from Proc. I.R.E., August, 1954.