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Summary
| Description |
English: Original captions: Mines and Minerals: "Lateral Tunnel Under Construction." Page's: "LATERAL CONDUIT UNDER CONSTRUCTION." Western: "Lateral Conduit Under Construction" and inscribed on the photo, "[Illegible] 9-15-02 Ill. Telephone & Telegraph Co -- Construction Methods --". This image is a composite from 3 published sources in order to eliminate artifacts from both printing and scanning. For scale, note that the track in the tunnel is 14-inch gauge. |
| Date | first published: 1902-10. Created: 1902-09-15 |
| 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 485. George W. Jackson, Tunnel Construction in Chicago -- Method of Driving and Constructing So As Not To Disturb the Surface, Mines and Minerals, Vol. XXIII, No. 6 (Jan. 1903); page 249. George W. Jackson, Underground Conduits in Chicago, Page's Magazine, Vol. II, No. 4 (Apr. 1903); page 321. |
| Author | George W. Jackson (died 1922) |
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.  You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:41, 5 March 2010 | | 489 × 690 (84 KB) | Douglas W. Jones | {{Information |Description={{en|1=Original captions: Mines and Minerals: "Lateral Tunnel Under Construction." Page's: "LATERAL CONDUIT UNDER CONSTRUCTION." Western: "Lateral Conduit Under Construction" and inscribed on the photo, "[Illegible] 9-15-02 I |
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