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File:Continuous transit.png

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

Summary

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
Permission
(Reusing this file)		 UK Copyright elapsed by passage of time (more than 70 Years) UK Copyright:See: Para 6 item 1 for print

Licensing

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inception

31 December 1912Gregorian

media type

image/png

checksum

e70393c2ed8fea85b4cf39c34d3afda27d83ce7a

determination method or standard: SHA-1

data size

9,063,641 byte

height

1,721 pixel

width

2,139 pixel

File history

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Date/TimeThumbnailDimensionsUserComment
current10:07, 25 November 2010Thumbnail for version as of 10:07, 25 November 20102,139 × 1,721 (8.64 MB)Timpo{{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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