• 455 Martinson, Los Angeles
  • 8 (043) 567 - 89 - 30
  • support@email.com
  • Unusual non-logarithmic squaring desktop QR 41 model by Dennert & Pape (D&P)
  • Colour combinations slide rule for Interior Designers
  • Professor Fuller’s Drum Calculator from 1878 - made by W.F. Stanley
  • Modern Kienzle wristwatch with slide rule bezel calculator
  • Ruxton Multi-Vider drop-lead pencil & slide rule
  • Rare Otis King Model N for Retail & Monetary with white scales (422 & 424) on a black background
  • Darnley’s Rotable Lightning Calculator/Pencil Case
  • Design for this Antenna Radar Beam Pattern Detection slide rule was classified during WWII by UK & US governments - made by Lawrence
  • Makeba Kombinator pencil & slide rule
  • Rare Carbic-made Fischer Calculator
  • Specialist slide rule for a national home cable radio broadcasting system offered in The Netherlands in the 1900s
  • Smallest drum (≈ 2.4m) made by LOGA

My stories ....

A dream to write a book for children has yet to happen but as the passion for my hobby took hold so did writing about slide rules - at least my often light-hearted take on various topics.

Mostly I publish my articles in the:

  • US: Journal of the Oughtred Society (JOS)
  • UK: Slide Rule Gazette and Skid Stick newsletter
  • NL: Mededeling en Informatie voor verzamelaars van historische Rekeninstrumenten (MIR) newsletter
  • DE: Rechenschieber-Brief electronic newsletter
  • xx: Proceedings of International Meetings (IMs)

All the articles, the most recent first, are listed with a short summary and often extra keywords to aid searching. For any article click on the highlighted link for a PDF download option. Please note some of them are updated/extended versions of the original article.

Use the BROWSE ALL PAPERS option (most are in English but the odd one is in Dutch) or the SEARCH BY KEYWORD to find topics of interest.

Please email me if you have any comments or questions.

Search for a paper

Currently there are 70 slide rule related articles to choose from.


Tip: separate keywords (implict AND) by a space or a comma and if needed, limit the search by adding keywords proceeded by a hyphen: e.g. -JOS.