Page:Astounding Science Fiction (1950-01).djvu/3

Reg. U. S. Pat. Off.

1. CONTENTS

2. JANUARY, 1950

   VOL. XLIV, NO. 5

3. SHORT STORIES

4. THE Xi EFFECT, by Philip Latham ................................................................................................................................................................................................................................................................................................................................................................................................

   6

5. UNDESIRABLE ALIEN, by David McCarthy ................................................................................................................................................................................................................................................................................................................................................................................................

   24

6. GYPSY, by Poul Anderson ................................................................................................................................................................................................................................................................................................................................................................................................

   66

7. NOVELETTES

8. NOT TO BE OPENED—, by Roger Flint Young ................................................................................................................................................................................................................................................................................................................................................................................................

   33

9. OLE MOTHER METHUSELAH, by René Lafayette ................................................................................................................................................................................................................................................................................................................................................................................................

   80

10. ARTICLE

11. MAXWELL'S DEMON AND MONSIEUR RANQUE, by Arthur C. Parlett ................................................................................................................................................................................................................................................................................................................................................................................................

    105

12. SERIAL

13. ... AND NOW YOU DON'T, by Isaac Asimov ................................................................................................................................................................................................................................................................................................................................................................................................

    111

14. (Conclusion)
15. READERS' DEPARTMENTS

16. THE EDITOR'S PAGE ................................................................................................................................................................................................................................................................................................................................................................................................

    4

17. BOOK REVIEW ................................................................................................................................................................................................................................................................................................................................................................................................

    153

18. BRASS TACKS ................................................................................................................................................................................................................................................................................................................................................................................................

    154

19. IN TIMES TO COME ................................................................................................................................................................................................................................................................................................................................................................................................

    162

20. THE ANALYTICAL LABORATORY ................................................................................................................................................................................................................................................................................................................................................................................................

    162

Editor
JOHN W. CAMPBELL, JR.
W2ZGU


Assistant Editor
C. TARRANT

COVER BY BONESTELL

Illustrations by Cartier, Gaughan, Orban, Rogers and Ward

The editorial contents have not been published before, are protected by copyright and cannot be reprinted without publishers' permission. All stories in this magazine are fiction. No actual persons are designated by name or character. Any similarity is coincidental.

Monthly publication issued by Street & Smith Publications, Incorporated at 775 Lidgerwood Avenue. Elizabeth, New Jersey. Reentered as Second Class matter October 19, 1948 at the Post Office at Elizabeth, New Jersey, under Act of Congress of March 3, 1879. Copyright, 1949, in U. S. A. and Great Britain by Street & Smith Publications, Inc. Allen L. Grammer, Chairman of the Board; Gerald H. Smith, President; Henry W. Ralston, Vice-President and Secretary; Thomas H. Kaiser, Treasurer. Subscriptions to Countries in Pan American Union, $2.75 per year; $3.00 per year in Canada, elsewhere, $3.25 per year. All subscriptions should be addressed to P.O. Box 494, Elizabeth, N. J. We cannot accept responsibility for unsolicited manuscripts or artwork. Any material submitted must include return postage.

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NEXT ISSUE ON SALE JANUARY 18, 1950

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