File:Wolf Rock Lighthouse Optic, Lantern and Chart.jpg
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Summary
| Description |
English: Engineering drawing of the 1869 optic, and sectional view of it within the 1869 lantern, of Wolf Rock Lighthouse (UK), showing its innovative method of flashing alternately white and red; adjacent chart shows its interaction with other nearby lights off the Cornish coast. Part of a presentation by the chief engineer of Trinity House, James Douglass, to the Institute of Civil Engineers. |
| Date | |
| Source | Minutes of the Proceedings of the Institute of Civil Engineers, Vol. XXX, Session 1869-70, Part II |
| Author | Institute of Civil Engineers |
Licensing
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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Note: This tag should not be used for sound recordings. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:31, 11 February 2020 | | 1,968 × 1,036 (229 KB) | Barabbas1312 | User created page with UploadWizard |
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