FIRE ENGINNERING®

FIRE ENGINNERING®

JAMES F. CASEY

Editor

RICHARD PRATT SYLVIA Associate Editor DOROTHY P. FERGUSON Managing Editor JANET JANES Editorial Assistant GORDON DRAPER Art Director

ARTHUR ARIAS Presentation Editor GEORGE J. QUINN Production Manager

RAYMOND J. CASTELLANOS Circulation Manager JOSEPH F. COSGROVE Publisher

ALFRED J. HOUGHTON Publishing Director

CONTRIBUTING EDITORS

Paul C. Ditzel

Joseph E. Keller

Walter J. Orey

Hubert Walker

CORRESPONDENTS

Henry T. Hanson, New England

R. D. Heinl, Eastern

Clarence E. Meek, Eastern

R. L. Nailen, Midwestern

George Beaumont, Missouri Valley

Cliff Dektar, Pacific Coast

Robert Swan, Pacific Coast

Roi B. Woolley, Pacific Coast

Donal Baird, Canadian

FIRE ENGINEERING

Vol

March 1971 . jl. 124, No. 3, Member, American Business Press and Audit Bureau of Circulations. Published monthly by the Magazine Publishing Division, The Reuben H. Donnelly Corp., a member of the Dun and Bradstreet Group. HARRINGTON E. DRAKE. President: EDWARD A. 0’RORKE:, Executive Vice President and General Manager. Maqazine Publishing Division. EXECUTIVE, EDITORIAC AND ADVERTISING OFFICES: 466 Lexington Avenue, New York, N.Y. 10017. Printed in Easton, Pa.

Subscriptions: Solicited only from paid or volunteer, Federal, state, county and local fire officials, including military and industrial fire protection engineers and consultants. Publisher reserves the right to refuse nonqualified subscriptions. Address correspondence regarding subscriptions, including change of address, to: FIRE ENGISI.EAvenue.

hose in field of publication; U. S. and anada: $8 a year, $13 for two years, 18 for three years. Foreign $19 a ear, $35 for two years. Second class ostage paid at New York, N.Y. and at additfonai mailing offices. Printed in U.S.A. Trademark ® in U.S. Patent office. © Copyright 1971 The Reuben H. Donnelley Corporation. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by $iny means, electronic or mechanical, including photocopying, recording or by any information storage retrieval system, without written permission of the copyright owner. Prices for bulk reprints of articles available on request.

The publisher, on written request, will refund that part of the price applying to unfilled portion of the subscription if service is unsatisfa* ‘

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