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A well docummented Curta

 
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murff



Joined: 27 Oct 2009
Posts: 307
Location: Switzerland

PostPosted: Tue Oct 10, 2017 6:45 pm    Post subject: A well docummented Curta Reply with quote

A well documented Curta



Today I got this Curta Type II with a LOT of documents...
Some of them are new for me and will be published soon.

The list:
- Kleine Zusammenstellung ueber Statistik
- Programme fuer die Berechnung von Wurzeln, Polynomen und Potenzreihen
- Klotoidenberechnung und Massenermittlungen mit der Curta-Rechenmaschine
- Curta Tabelle - Table (Contina)
- Contina bill and envelope
- Staffelwalze (Step drum) - study
- Quadratwurzel nach Toepler
- Quadratwurzel - notes about square roots
- Ein rekursives Verfahren zur Naeherung des Kreisumfangs
- Das Bestimmen von Naeherungsbruechen mit Hilfe der Curta-Rechenmaschine
- Vom Einsatz der Curta-Rechenmaschine im Mathematikunterricht eines Lehrerseminars
... and more

It would be great if you could post some of your rare and unusual documents!
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Last edited by murff on Sun Oct 22, 2017 1:56 pm; edited 1 time in total
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davhamm



Joined: 08 Nov 2015
Posts: 104
Location: Michigan

PostPosted: Fri Oct 13, 2017 1:06 am    Post subject: Reply with quote

Wow, impressive. Where did you find that stash?
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murff



Joined: 27 Oct 2009
Posts: 307
Location: Switzerland

PostPosted: Sat Oct 14, 2017 1:39 pm    Post subject: Reply with quote

I got a private offer locally... Smile




... a first scanned item - a folding envelope by Contina
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murff



Joined: 27 Oct 2009
Posts: 307
Location: Switzerland

PostPosted: Sun Oct 22, 2017 1:56 pm    Post subject: Reply with quote

... published:

- Kleine Zusammenstellung ueber Statistik
- Programme fuer die Berechnung von Wurzeln, Polynomen und Potenzreihen
- Klotoidenberechnung und Massenermittlungen mit der Curta-Rechenmaschine
- Curta Tabelle - Table (Contina)
- Contina bill and envelope
- Staffelwalze (Step drum) - study
- Quadratwurzel nach Toepler
- Ein rekursives Verfahren zur Naeherung des Kreisumfangs
- Das Bestimmen von Naeherungsbruechen mit Hilfe der Curta-Rechenmaschine

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Rubberswan



Joined: 19 Apr 2016
Posts: 12
Location: UK

PostPosted: Sun Oct 22, 2017 3:16 pm    Post subject: Reply with quote

Itís interesting to see that Contina were still repairing Curtas as late as April 1972. I wonder how long that continued.

I calculate that with a 1972 exchange rate of about 10 Swiss Francs to the pound Sterling, and inflation of somewhat more than a factor of 10, at todayís prices the repair cost about £50 - very reasonable!
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