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10 messages, 2 photos added in the last 7 days
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  • Re: Pickett 931

    Very likely. In electronics 2pi is used a lot. Charles ... On Sat, 7/25/15, frankbr@... [sliderule] wrote: Subject: SR

    doctorquinlan 1 day ago
  • Re: Pickett 931

    Hello Marion, Since your observation is so correct, I have often wondered if the inclusion of the scale 1(2pi) might have been some kind of contract renewal

    lotsofluck9999 2 days ago
  • Re: Pickett 931

    In the mid 70's, CREI used a K&E Deci-lon but it wasn't marked for CREI. ... On Thu, 7/23/15, frankbr@... [sliderule]

    richlinda6751 3 days ago
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Group Description

The International Slide Rule Group "ISRG" is devoted to collectors of slide rules and associated mechanical calculating instruments.

You may contact the listowner at:


To subscribe, send an email to:


If you are serious about slide rule collecting, it is highly recommended that you consider joining

The Oughtred Society.

Brought to you by:

Cyril Catt  - 
Andrew Davie  - 
Gary Flom  - 
Craig Kielhofer  - 
Jerome Mc Kenna

Slide rules are THE ORIGINAL solar powered calculators. Try using one in the dark and you'll see I'm right, or not see as the case may be.

This is your groupowners attempt at humor.

Group Information

  • 1565
  • Mathematics
  • Dec 21, 1998
  • English

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