File:Slide Rule RIETZ (1965), Made in France by Raphoplex (Breveté S.G.D.G.) (2021-01-13 by Kecko).jpg

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Slide Rule RIETZ
A slide rule from 1965 with a sliding central strip and cursor, marked with logarithmic scales. An analog calculating machine that was used at a school in St. Gallen. Made in France by Raphoplex (Breveté S.G.D.G.). The setting shows 1.3 (D) x1.3 (C) = 1.69 (D). The line on the cursor shows on A 1.69 squared = 2.85. Easy and fast without mistyping. Doesn't need electricity. The decimal places must be estimated in one's head. A good brain training. Switzerland, January 13, 2021.
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Source Slide Rule RIETZ
Author Kecko from Eastern Switzerland
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  • Flickr Tags: 2021 kecko switzerland swiss schweiz suisse svizzera ostschweiz SG rechenschieber sliderule rechenstab analog arithmetic rechnen slipstick mathematik math schule school rietz raphoplex Breveté S.G.D.G. vintage alt old ancient antik swissphoto.

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This image was originally posted to Flickr by Welcome to Switzerland backstage! at https://flickr.com/photos/70981241@N00/50832774046. It was reviewed on 16 December 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

16 December 2022

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current13:08, 16 December 2022Thumbnail for version as of 13:08, 16 December 20225,200 × 3,467 (8.71 MB)Clusternote (talk | contribs)Transferred from Flickr via #flickr2commons

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