668с

1940г

* *■ •' E E C T Jft ICAL ENGINEERING TEXTS

PRINCIPLES

OF

ALTERNATING-CURRENT MACHINERY

BY

RALPH R. LAWRENCE

Professor of Electrical Machinery of the Massachusetts Institute of Technology; Fellow of the American Institute of Electrical Engineers

Third Edition

SEVErjHf^mpression

•jCTPAHHOfl *

^cGRAW-HILL BOOK COMPANY, Inc.

* new york and london

* 1940