In this issue

MAGNETIC MATERIALS are featured in 3 papers in this issue. One summarizes the results of extensive research on magnetic alloys of iron, nickel, and cobalt (pages 1292–9); a second discusses different grades of silicon steel and other magnetic materials and their application to communication equipment (pages 1348–53); a third outlines recent improvements in communication transformers, which have been made possible largely by improved core materials (pages 1367–73). A fourth paper on this same general subject contains a bibliography of 211 items on research in magnetics done during the years 1933–34 (pages 1354–9).