Image: Science and Invention Nov 1928 Cover 2

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Description: The television image would be viewed through the cone. The image was 1.5 inches square (4 by 4 cm) and had 48 scan lines at 7.5 frames per second. (This was a low definition "48p" display.) The man is using a 125 hertz tuning fork to adjust the scanning wheel to 450 RPM. By looking through the tuning fork at the line pattern on the hub, he could see when the wheel was at the correct speed. "How to build the S&I Television Receiver" starts on page 618. Science and Invention, November 1928. Volume 16 Number 7. Published by Experimenter Publishing. New York, NY. Editor-in-Chief and Publisher: Hugo Gernsback Cover Art by R. E. Pattiani. Image:Science and Invention Nov 1928 Cover 2.jpg Image:Science and Invention Nov 1928 pg578.png Image:Science and Invention Nov 1928 pg618.png Image:Science and Invention Nov 1928 pg619.png Image:Science and Invention Nov 1928 pg620.png Image:Science and Invention Nov 1928 pg632.png Image:Science and Invention Nov 1928 pg634.png Image:Science and Invention Nov 1928 pg636.png The page numbers were on an annual basis, not per issue. This issue had pages 577 to 672. The magazine is 8.5 by 11.5 inches.
Title: Science and Invention Nov 1928 Cover 2
Credit: This page was scanned by User:Swtpc6800 on an Epson Perfection 1240U at 300 dpi with half-tone de-screening enabled and stored as TIFF. The image was cropped and touched up in Adobe Photo Elements 5.0. This copy saved as a 100 dpi JPG.
Author: Experimenter Publishing
Permission: This 1928 issue of Science and Invention would have the copyright renewed in 1955. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. http://onlinebooks.library.upenn.edu/cce/ The search of the Renewals for Periodicals for 1954, 1955 and 1956 show no renewal entries for Science and Invention. The copyright on the magazine was not renewed and it is in the public domain. Science and Invention ceased publication with the August 1931 issue. A search of the copyright renewal records from 1951 to 1959 shows no entries for Science and Invention. All issues are in the public domain.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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