Chemical and Engineering News 1155 Sixteenth St., N.W., Washington, D.C. 20036 Editor: PATRICK P. MC CURDY Managing Editor: Melvin J. Josephs Assistant Managing Editor: Brendan F. Somerville Director of Design: Joseph Jacobs Senior Editors: Earl V. Anderson, Michael Heylin (New York), John F. Henahan (San Diego), David M. Kiefer (Washington). Senior Associate Editors: Arnold E. Levitt, Howard J. Sanders Industry/Business: Donald J. Soisson (Head), Ernest L Carpenter, Thomas H. Maugh, I I , Madeleine Polinger (Assistant Editors) Science/Education: James H. Krieger (Acting Head), Robert M. Hadsell (Assistant Editor) Technology: James H. Krieger (Head), Joseph Haggin (Staff Writer), Richard J. Seltzer (Assistant Editor) Features: John J. Elsbree (Head) ACS News: Michael E. W. Shaffer (Head) Editing Services: Joyce A. Richards (Head), Kathryn Campbell, Carol J. Swartz (Assistant Editors) Editorial Reference: Barbara A. Gallagher Production Manager: Bacil Guiley Associate Production Manager: Leroy Corcoran Art Director:
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Art/Production: Joe Phillips, Judy Bitting NEWS BUREAUS: NEW YORK: H. Clifford Neely (Head), William F. Fallwell (Associate Editor), Thomas T. Bradshaw, Stephen C. Stinson (Assistant Editors). CHICAGO: Lloyd W. Dunlap, Ward Worthy (Assistant Editors). HOUSTON: Bruce F. Greek (Head). SAN FRANCISCO: Dermot A. O'Sullivan (Head). WASHINGTON: Fred H. Zerkel (Head), Thomas E. Feare (Assistant Editor) FOREIGN BUREAUS: FRANKFURT: André E. Pruniaux (Assistant Editor). LONDON: Robin A. Johnson (Assistant Editor). TOKYO: Michael K. McAbee (Head) Advisory Board: Aaron M. Altschul, Norman Coggeshall, Thomas G. Gibian, Herbert S. Gutowsky, Anna J. Harrison, Norman Kharasch, Lawrence Lessing, Norman J. Lewis, Richard F. Messing, Michael N. Papadopoulos, Rustum Roy, Lewis H. Sarett, Harry B. Warner, Robert West, Richard L. Wolfgang Published by A M E R I C A N C H E M I C A L SOCIETY Frederick T. Wall, Executive Director Division of Public Affairs and Communication Richard L. Kenyon, Director William Q. Hull, Publishing Services Arthur Poulos, Editorial Promotion © Copyright 1971 by the American Chemical Society Subscription Service: On all subscription matters, including change of address, write to ACS Subscription Service Dept., 1155—16th St., N.W., Washington, D.C. 20036. For address change, send old (a mailing label is preferred) and new addresses with ZIP codes. Allow four weeks for change. Subscription Rates 1971: nonmembers, U.S. and Canada, 1 yr. $7.00, 2 yr. $12, 3 yr. $16; foreign $15, $27.50, $40. Postage: Canada, Pan American Union, $4.00; foreign $5.00 (or air lift, Europe only, $11). Single copies: Current $0.50. Rates for back issues and volumes are available from Special Issues Sales Dept., 1155—16th St., N.W., Washington, D.C. Claims for missing numbers will not be allowed if received more than 60 days from date of mailing plus time normally required for postal delivery of journal and claim. No claims allowed because of failure to notify the Subscription Service Department of a change of address or because copy is "missing from files." An annual index (subjects and names) is available for $20. Standing orders are accepted. Back and current issues are available on microfilm. For further information, contact Special Issues Sales, ACS, 1155—16th St., N.W., Washington, D.C. 20036. Published by the American Chemical Society from 20th and Northampton Sts., Easton, Pa., weekly except the last week in December, plus one extra issue—Facts and Figures, Sept. 6. Second class postage paid at Easton, Pa. The American Chemical Society assumes no responsibility for the statements and opinions advanced by the contributors to its publications. Views expressed in the editorials are those of the editors and do not necessarily represent the official position of the American Chemical Society.
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