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Front Matter ANTIMICROBIAL AGENTS AND CHEMOTHERAPY VOLUME 1 * NUMBER 6 * JUNE 1972 EDITORIAL BOARD GLADYS L. HOBBY, Editor-in-Chief (1975) Infectious Disease Research Institute, East Orange, N.J. WALTER D. CELMER, Editor (1975) EDWARD W. HOOK, Editor (1976) Pfizer hIc., Grotoln, Coiml. University of Virginia, Charlottesville JOEL G. FLAKS, Editor (1976) LEON H. SCHMIDT, Editor (1974) University ofPennsylvania, Phliladelphia Southern Research Institute, Birminglham, Ala. Fred Allison, Jr. (1973) H. Grisebach (1974) T. J. Perun (1974) Theodore Anderson (1973) Jack Gwaltney (1974) K. E. Price (1973) Robert Austrian (1974) Fred Hahn (1973) C. Reilly (1972) John Bennett (1973) William Hewitt (1974) R. W. Rickards (1974) Joe Bertino (1974) Richard Hornick (1974) R. W. Riddell (1974) E. Borowski (1973) Milton Huppert (1974) Richard Roberts (1973) D. Buyske (1974) George Gee Jackson (1974) L. Sabath (1973) Yves Chabbert (1974) Keith Jensen (1974) Arthur K. Saz (1973) Patricia Charache (1974) E. H. Kass (1973) F. C. Sciavolino (1973) Ernest Chick (1973) Donald Kaye (1973) Piero Sensi (1974) Leighton E. Cluff (1974) WVm. Kirby (1973) David Smith (1974) Frank Collins (1973) Vernon Knight (1974) Earle Spaulding (1974) John Corcoran (1974) M. Glenn Koenig (1973) Gene Stollerman (1974) Julian Davies (1973) Calvin Kunin (1972) R. Sutherland (1973) Bernard Davis (1973) Mark Lepper (1972) Morton N. Swartz (1973) Arnold L. Demain (1973) Robert G. Loudon (1974) Ralph Tompsett (1973) Roger DesPrez (1973) Thomas H. Maran (1974) John P. Utz (1973) Liebor Ebringer (1974) Lester Mitscher (1974) D. Vazquez (1974) H. L. Ennis (1974) S. Mitsuhashi (1974) G. H. Wagman (1974) Maxwell Finland (1973) R. B. Morin (1973) Kenneth S. W'arren (1973) Harry Gooder (1973) L. Nickell (1974) B. Weisblum (1973) M. Gorman (1974) David Perlman (1972) Temple Williams (1973) ROBERT A. DAY, Managing Editor, 1913 1 St., N. W., Washingtont, D.C. 20006 EX OFFICIO MORRIS F. SHAFFER, President (1971-1972) R. G. E. MURRAY, Vice-President (1971-1972) DONALD E. SHAY, Secretary T. J. CARSKI, Treasurer Antimicrobial Agents and Chemotherapr, a publication of the 20006. Correspondence from ASM members relating to member- American Society for Microbiology, 1913 I St., N.W., Washington, ship dues, member subscriptions, changes of address, incorrect D.C. 20006, is devoted to the dissemination of knowledge relating journaLs, etc, should be directed to the Executive Secretary, to all aspects of antimicrobial agents and chemotherapy, including American Society for Microbiology, 1913 I St., N.W., Washington, cancer chemotherapy. Antimicrobial Agents and Clhemotherapy D.C. 20006. Published monthly by the ASM at 428 E. Preston St.. is published monthly, and the twelve numbers are divided into Baltimore, Md 21202. two volumes per year. The subscription price is $40 (foreign, $41) per year. Single copies are $4.00 (foreign, $4.25). 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