Vol. 73, No. 4, June 1964. Cover art by John Schoenherr Illustrating "Stuck," a novelette by John Berryman. ALSO: Dolphin's Way by Gordon R. Dickson; Snap Judgment by J. T. McIntosh; Undercurrents (serial, part 2 of 2) by James H. Schmitz; Mustn't Touch by Poul Anderson; I, BEM by Leigh & Walt Richmond. FEATURES: Brass Tacks (letters); Louis Pasteur, Medical Quack (editorial) by John W. Campbell, Jr.; Plowshare Today (science essay) by Edward C. Walterscheid; The Analytical Laboratory: February-March 1964; The Reference Library by P. Schuyler Miller. Interior art by Steven Verenicin, Leo Summers, John Schoenherr, Michael Arndt.