File:Continuous transit.png

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Original file (2,139 × 1,721 pixels, file size: 8.64 MB, MIME type: image/png)

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Description
English: Diagram of a "probable underground railway of the future" c. 1913 showing sub-surface screw and carriages continuously driven forward by rollers (sprags). Originally printed in fortnightly magazine (14 days) and reprinted in bound edition (undated). More information about Harmsworth here.
Date
Source Scanned and slightly retouched around centre-fold by User:Timpo
Author Harmsworth Popular Science/ EDucational Book Co, London
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(Reusing this file)		 UK Copyright elapsed by passage of time (more than 70 Years) UK Copyright:See: Para 6 item 1 for print

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current10:07, 25 November 2010Thumbnail for version as of 10:07, 25 November 20102,139 × 1,721 (8.64 MB)Timpo (talk | contribs){{Information |Description={{en|1=Diagram of a "probable underground railway of the future" c. 1913 showing sub-surface screw and carriages continuously driven forward by rollers (sprags)}} |Source=Scanned and slightly retouched around centre-fold by User

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