Page:Astounding Science Fiction v54n06 (1955-02).djvu/158

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I would like to have more details about this article. Perhaps you could put me in touch with the author.

In recent issues I have found the features—especially the editorial page—highly interesting and thought-provoking, but the stories have been miserable and the November issue hit a new low. I enjoy Astounding very much but if the stories continue in this vein. I suggest you give up the ghost.

Respectfully yours,

John Horowitz
235 Lefferts Ave.,
Brooklyn 25, N. Y.


More details on Clough's model appeared in the April 1954 issue of Air Trails.

Dear Mr. Cambell:

I have just read Pfc. Richard Bruner's letter in BRASS TACKS. I would like to comment on one of his criticisms regarding sociologists and psychologists and mathematical methods.

In commenting, he quotes your editorial "The sociologists and psychologists have long maintained that mathematical methods are not applicable to human problems". He then counters with "Man! I defy you to find one psychologist doing experimental research of any kind who has not used statistical methods in his research. He refers to five books. The first uses the word methods but the

PUBLICATIONS ON SYMBOLIC LOGIC P 16: SYMBOLIC LOGIC —TWENTY PROBLEMS AND SOLUTIONS. Report. Contains some problems by Lewis Carroll and John Venn (out of print), and many other new problems. Guide to using symbolic logic in actual situations $1.80 P 5: BOOLEAN ALGEBRA, (THE TECHNIQUE FOR MANIPULATING ‘AND’, ‘OR’, ‘NOT’, AND CONDITIONS) AND APPLICATIONS TO INSUR¬ ANCE: also DISCUSSION. Reprint. Explains in simple language: what Boolean algebra is; how to recog¬ nize the relations of Boolean algebra when expressed in ordinary words; anti how to calculate with it. Contains problems, solution*, comments, discussion $1.50 P 4: A SUMMARY OF SYMBOLIC LOGIC AND ITS PRACTICAL APPLICATIONS. Report. Rules for calculating with Boolean algebra. Other parts of symbolic logic. Applications of Boolean algebra to com¬ puting machinery, circuits, and contracts. Eight com¬ plete problems and solutions $2.00 P 14: CIRCUIT ALGEBRA — INTRODUCTION. Report. Explains simply a new algebra (Boolean algebra modified to include time) that applies to on-off circuits, using relays, electronic tubes, etc. Covers both static and sequential circuits. Applications to control, programming, and computing. Problems and solutions involving circuits $1.90 P 25: NUMBLES — NUMBER PUZZLES FOR NIMBLE MINDS. Report. Contains collection of puzzles like: TRY 4-THESE« TWVAS. HAVE+FUN — WASE, etc. All are new numbies, additions, multi¬ plications, etc., some easy, some hard. Each with two messages, one open, one hidden. Hints for solution. Good exercises in logical reasoning $1.00 COMPUTERS & ROBOTS P 2: COMPUTERS & AUTOMATION. Monthly. Articles on computing machinery, automatic control, cybernetics, robots, etc. Reference information: roster of organizations, list of automatic computers, etc. Annual subscription $4.50 P 6: CONSTRUCTING ELECTRIC BRAINS. Re¬ print of thirteen published articles. Explains simply j how an automatic computer is constructed; how to make it add, subtract, multiply, divide, and solve prob¬ lems automatically, using relays or electronic tubes or other devices. Contains many examples of circuits. $2.20 P 1 : CONSTRUCTION PLANS FOR SIMON, the Small Mechanical Brain. Complete plans, circuits, essential wiring diagrams, parts list, etc., enabling Simon to handle numbers up to 255, and to perform nine mathematical and logical operations $5.50 P 3: CONSTRUCTION PLANS FOR SQUEE, the Robot Squirrel. Complete plana, circuits, wiring dia¬ grams, parts list, etc. Squee rolls over the floor, picks up “nuts” in his “hands”, takes them to his “nest”, there leaves them, and then goes hunting for more nuts $4.00 P 10 : THE CONSTRUCTION OF LIVING ROBOTS. Report. Discusses the properties of robots and of living beings, and outlines how to construct robots made out of hardware which will have the essential properties of living beings. Gives circuit diagrams. $1.00 Your money is returned at once If you are not satisfied. You can see these for almost nothing — why not take a look at them? Send request direct — not through a dealer. (P.S. We also offer 12 more publications, and 26 courses by mail. We have students In 48 states and territories. 20 for¬ eign countries. Ask us for information.) I — MAIL THIS COUPON“"“"-! I Edmund C. Berkeley and Associates ( ’ 815 Washington St.. R109, Newtonville 60, Mass. J I 1. Please send me publications circled: | I Pl P2 1*3 P4 P5 P6 P10 P14 P16 P25 j ! Returnable in 7 days for full refund if not satis- ■ I factory. I enclose $ in full payment (add I I 10c per item to cover cost of handling and mailing).

2. Please send free announcement of □ publications I I and □ courses.

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BRASS TACKS

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