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  • Re: Interesting Calculation

    I've lost these problems. Can someone direct me to them. Thanks, marion moon

    mfmoon2002 31 minutes ago
  • Re: Interesting Calculation

    Hi Joe, It's widely quoted as an interesting factoid (although it doesn't seem to have interested many slide-rulers!) but I don't know its origin. Regards, Rod

    rodlovett 14 hours ago
  • Flying Fish I-J Rule

    Hi Folks, I picked up an odd Flying Fish I-J rule from this ebay listing https://www.ebay.com/itm/302542718576 It has no numerical designator and has some

    msmccor100 15 hours 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

  • 1632
  • Mathematics
  • Dec 21, 1998
  • English

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