MT.SHASTA GRAVEL CO.,INC., Mt.Shasta, California / USA    (1980)
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Manufactured by Parisian Novelty Co., Chicago     Patent 2073421

S C A L E S   of   the    C O N C R E T E    C A L C U L A T O R
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                                                     VERSION (A)

A  THICKNESS        ( 1 3/4" .. 16'  )                    INCHES
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B  HEIGHT or WIDTH  (   100' .. 1'   )
C  LENGTH           (     6" .. 100' )
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D  CUBIC YARDS      (    1/2 .. 100  )           1/4 & 1/8 SCALE

R E M A R K S :
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Click on a picture above to see the assembled  S E T ...

Scales C & D are functioning as a "common" slide rule.

From the   I N S T R U C T I O N S   printed in the bottom:

 EXAMPLE:  How many cubic yards of concrete in a wall 9" thick,
           18' high and 50' long?
  ANSWER:  25 cubic yards.
SOLUTION:  Find 9" on scale A connected to 18' on scale B,
           then connected to 50' on scale C read 25 on scale D.

impressum:
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© C.HAMANN      http://public.BHT-Berlin.de/hamann       13/19/08