IM2021

www.im2021.org

  Programme

of the 27th International Meeting of Collectors and Researchers of Slide Rules and other Historic Computing Instruments.

Saturday
2021-09-11 		 
15:00 - 16:00 CEST
gathering / fixing technical problems / social hour
introduction of new participants

16:00 - 18:30 CEST [ 15:00 BST // 10:00 EDT // 07:00 PDT ]

formal opening of the conference

Session I: Collecting in Pandemic Times

Why do we collect?
Jose Fernāndez (ES)

The ISRM and its Library:
Preserving my Sanity to Preserving the Museum
Michael V Konshak (US)

Keeping our Slide Rule Heritage:
The Rescue of the linealis.org Web Site
Jose Fernāndez (ES)

The future of our collections
Nathan Zeldes (IL)

Slide Rules and Numeracy in the Current Active Generation and the Generations to Come
Marvin Clarence (ID)

The Second Death of the Slide Rule
Karl Kleine (DE)

18:30 - 19:30 CEST
break / discussions / social hour

19:30 - 21:00 CEST [ 18:00 BST // 13:00 EDT // 10:00 PDT ]

Session II: Mechanical Calculators

Leupold, Braun, Vayrine:
European Scientists and Inventors in the 18th century
Wolfgang Irler (IT)

Experiences in building a Braun Replica
Jan Meyer (DE)

The Working Life of an Inventor of Mechanical Calculating Machines
Gian Piero Barozzi (IT)

21:00 ...
general discussions, open end

Sunday
2021-09-12 		 
16:00 - 18:00 CEST [ 15:00 BST // 10:00 EDT // 07:00 PDT ]

Session III: Slide Rules

Keeping in Rhythm
David Rance (NL)

Calculating Disks for Spirometry
Jacques Perregaux (CH)

Gilson Slide Rules: An Appreciation
John H Runnels (US)

The Concise Model 46
Robert Adams (AU)

18:00 - 19:00 CEST
break / social hour

19:00 - 21:00 CEST [ 18:00 BST // 13:00 EDT // 10:00 PDT ]

Session IV: Logarithm Tables

The Invention and Development of those Wonderful Logarithms
Robert G De Cesaris (US)

De Logarithmorum Ratione:
a Collection of Sources about the Computation of Logarithms
Klaus Kühn (DE)

awarding of the 2021 Oughtred Society Award and Fellowships

reports & announcements by OS, UKSRC, RST, KRING

IM2022 announcement / invitation

slide rule auction by the Oughtred Society

end of IM programme

. . .
open end

time zones   We expect the most participants from the following four time zones. Your local time for other time zones should easily be deduced from the times given below.
CEST Central European Summer Time
UTC+2: Berlin, Amsterdam, Rome, Paris, Madrid
BST British Summer Time
UTC+1, CEST-1: London
EDT Eastern Daytime Time
UTC-4, CEST-6: Boston, New York, Washington DC
PDT Pacific Daytime Time
UTC-7, CEST-9: San Francisco