File:IllinoisTunnelMap1902.png
![File:IllinoisTunnelMap1902.png](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/IllinoisTunnelMap1902.png/353px-IllinoisTunnelMap1902.png?20100322024716)
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Captions
Summary
editDescriptionIllinoisTunnelMap1902.png |
English: Original Caption: "Showing Conduits as Completed Sept 1. 1902." Retouched to remove spots and improve legibility. The short side spurs terminating in dots are the shafts used to construct the tunnel system. |
Date | |
Source | George W. Jackson, Scope, Extent and Construction of the Underground Conduits of the Illinois Telephone and Telegraph Co. in Chicago, Journal of the Western Society of Engineers, Vol. VII, No. 5 (Oct. 1902); page 495. |
Author | George W. Jackson (died 1922) |
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Licensing
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:47, 22 March 2010 | ![]() | 498 × 845 (64 KB) | Douglas W. Jones (talk | contribs) | {{Information |Description={{en|1=Original Caption: "Showing Conduits as Completed Sept 1. 1902." Retouched to remove spots and improve legibility. The short side spurs terminating in dots are the shafts used to construct the tunnel system.}} |Source=G |
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