Vol 43, No 4.

Contents:
4 • Open to Question • [Editorial (Astounding)] • essay by John W. Campbell, Jr. [as by The Editor]
6 • The Green Forest • [Rull] • novelette by A. E. van Vogt
27 • In Times to Come (Astounding, June 1949) • [In Times to Come (Astounding)] • essay by The Editor
28 • To Watch the Watchers • short story by W. Macfarlane
36 • A Sound Investment • [Ole Doc Methuselah] • novelette by L. Ron Hubbard [as by René Lafayette]
58 • Entity • [Psychotechnic League] • short story by Poul Anderson and John Gergen
73 • The Aphrodite Project • essay by R. S. Richardson [as by Philip Latham]
84 • The Analytical Laboratory: March 1949 (Astounding, June 1949) • [The Analytical Laboratory] • essay by The Editor
85 • Needle (Part 2 of 2) • [Needle] • serial by Hal Clement
129 • How to Do it Department: Multiplication • essay by uncredited
130 • Minority Report • novelette by Theodore Sturgeon
149 • Brass Tacks (Astounding, June 1949) • [Brass Tacks] • essay by The Editor
158 • The World of Nighmare Fantasies • (1948) • essay by Виктор Болховитинов? and Василий Захарченко? [as by Viktor Bolkhovitinov and Vassilij Zakhartchenko]
158 • Reviews (Astounding, June 1949) • essay by L. Sprague de Camp.