Dutch Circle of Slide Rule Collectors
Founded in 1991, The Dutch Circle (KRING) has grown into an informal group of about 60 collectors, sharing the following goals:
- mutual support of members for collecting and research
- promotion of public knowledge and awareness of the historical interest of the slide rule
These goals are pursued by issuing our periodical "MIR", by organising meetings, presence at fairs, by publishing papers, books, catalogues, interviews and by communicating with Dutch and international communities of collectors and other interested parties.
End 2004 the area of interest has been expanded, and the name of the Circle was changed to:
Kring Historische Rekeninstrumenten (Dutch Circle for Historical Calculating Instruments)
Breaking news...
On the occasion of the 400th anniversary of Wilhelm Schickard's first calculating machine, a small but fine exhibition has been set up on the Groenenborger campus of the University of Antwerp, including replicas of the Schickard and Leibniz machines, and many other highlights from the history of mechanical calculation. In the context of this exhibition, there will be a symposium on 1 February 2025.
Program:
10:00–11:00 Wilfried Denz, 400 years mechanical calculation
11:00–11:30 Cris Vande Velde, The Faber Brunsviga and square roots
11:30–12:00 lectures and topics invited
12:00–13:00 lunch
13:00–16:00 swap meet, repair café, visit exhibition
Location: University of Antwerp, Campus Groenenborger, Building T, Groenenborger 171, Antwerp
Information: cris@crisvandevel.de
Registration: before 15 January 2025 via online registration form.
Announcing a new Book for Slide Rule Collectors:
“THE ALRO CATALOGUE” …
… featuring for the first time all 52 currently known solid calculating discs and slide rules, plus the over a hundred slide charts, that were produced by the Dutch firm “ALRO” in the city of The Hague, from the mid-1930’s until the late 1990’s.
We proudly announce “THE ALRO CATALOGUE” (2020), in a hardback bound book format, with more than 200 pages of descriptions, tabular data, documentary annexes, a new coding system for identification, and most importantly the high-resolution colour images of each and every ALRO that is known today.
“THE ALRO CATALOGUE” is for sale at € 35.- + shipping costs
For more information - and ordering - click here
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