2 Matching Annotations
  1. May 2022
    1. What is that tool under the pencil?

      Sorry, just seeing this now. It's assuredly a sliderule, which would have been a common tool for engineers and mathematicians of his era to have had. They became less common with the advent and proliferation of calculators.

  2. Feb 2022
    1. You can look up for yourself some ofhis notes on their website.[12] Soon, you will be able to access thewhole digitalised slip-box online.

      For those interested in looking at a system in English but with a slightly different form, but ostensibly similar, try W. Ross Ashby's digitized note collection: http://www.rossashby.info/

      Perhaps not coincidentally, Ashby was a research colleague of Luhmann's.