File:Vintage Keuffel & Esser Company Beginner's Slide Rule (Reverse Side), No. 4058C, All Wood Framed Cursor, Made In USA, Circa 1930s (31955561837).jpg
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English: Keuffel & Esser "Beginner's Slide Rule" (reverse side), model 4058C, wood-framed cursor, made in USA, circa 1930s. This is the underside of a low-cost slide rule intended for students and other beginners, with its scales printed directly on wood rather than engraved into celluloid facing. It is a basic "Mannheim-type" slide rule, with two single-decade (1-to-10) scales C and D for ordinary multiplication and division, and two two-decade (1-to-100) scales A and B for calculations involving squares and square roots. This is a view of the rule's underside, which has an extensive table of equivalents. On the right end is a transparent notch with hairline; this shows the back side of the removable, reversible slide, with its sine (S), tangent (T), and logarithm (L) scales.) |
| Date | |
| Source | Vintage Keuffel & Esser Company Beginner's Slide Rule (Reverse Side), No. 4058C, All Wood Framed Cursor, Made In USA, Circa 1930s |
| Author | Joe Haupt from USA |
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This image was originally posted to Flickr by France1978 at https://flickr.com/photos/51764518@N02/31955561837. It has been reviewed on 2021-05-06 06:38:33 by FlickreviewR 2, who found the author on the bad authors list. This means that the Flickr user is known to upload images with possibly problematic license information. The image should be checked carefully because some Flickr users are blacklisted for only a limited portion of their uploads. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 06:38, 6 May 2021 | | 4,006 × 2,242 (2.75 MB) | Colin Douglas Howell (talk | contribs) | {{Information | Description = {{en|Keuffel & Esser "Beginner's Slide Rule" (reverse side), model 4058C, wood-framed cursor, made in USA, circa 1930s. This is the underside of a low-cost slide rule intended for students and other beginners, with its scales printed directly on wood rather than engraved into celluloid facing. It is a basic "Mannheim-type" slide rule, with two single-decade (1-to-10) scales C and D for ordinary multiplication and division, and two two-decade (1-to-100) scales A a... |
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