( ARISTO-Werke )  Dennert & Pape, Hamburg / Germany  (1927)
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» B U S I N E S S   S Y S T E M   D R . S T E N D E R «  *)

S C A L E S  of  the   DENNERT & PAPE           Model 43.28
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Front Side           [ inverse / RED ]            Back Side
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( 0 ...  25 cm Ruler )

D       X
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C       X                                    G      X
[CI]    [1/X]  w.MARKS: ...,foot,inch        Z      2,3,4,5
CF      3.6*X                                       5,6,7,8
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DF      3.6*X
E       lgX     =   £   0 ... 1.0  =  Engl.Pound-Scale
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                sh, d   0 ... 20   =  Shilling, Penny-Scale

R E M A R K S :
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This old model is made of mahogany with scales on celluloid
veneer.  The engravement »27« in the bottom means "1927".

This  »Business«  slide rule has  DF/CF-Scales  folded at
3.6*X  for Days-of-the-Year (and NOT at π).  The Z-Scales
on the slider's back are for calculating compound interest.

Historical Remarks ...

*) »System Dr.Stender«  from  D.v.JEZIERSKI's  book (p.110)

impressum:
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© C.HAMANN   http://public.BHT-Berlin.de/hamann    01/28/08