Subsoil: Austin, M. The American rhythm. Ade, G. Old wisdom in a new tongue. Howe, E. W. Prudence militant. Frost, R. The soil of the Puritans. Sherman, S. P. The great and good tradition. Santayana, G. The tower of irony.--New growths: Millay, E. St. V.Youth and wings. Mencken, H. L. Smartness and light. Sandburg, C. Flame and slag. Lindsay, V. Salvation with jazz. Lardner, R. W. Beyond grammar. Manhattan wits. Day in and day out.--Postscript: Van Doren, C. The friendly enemy.--Bibliography (p. 219-235).