Letters to the editor

INSTITUTE members and subscribers are invited Co contribute to these columns expressions of opinion dealing with published articles, technical papers, or other subjects of general professional interest. While endeavoring to publish as many letters as possible, Electrical Engineering reserves the right to publish them in whole or in part or to reject them entirely. Statements in letters are expressly understood to be made by the writers. Publication here in no wise constitutes endorsement or recognition by the AIEE. All letters submitted for publication should be typewritten, double-spaced, not carbon copies. Any illustrations should be submitted in duplicate, one copy an inked drawing without lettering, the other lettered. Captions should be supplied for all illustrations. To the Editor: In a recent letter to the editor (EE, Mar ´48, pp 311–12) J. B. Winther presented a scheme for obtaining transformation from three to two phase alternating current by utilizing a 3-phase wound-rotor induction motor with a locked rotor.