File:Wolf Rock Lighthouse Optic, Lantern and Chart.jpg
Jump to navigation
Jump to search
Size of this preview: 800 × 421 pixels. Other resolutions: 320 × 168 pixels | 640 × 337 pixels | 1,024 × 539 pixels | 1,280 × 674 pixels | 1,968 × 1,036 pixels.
Original file (1,968 × 1,036 pixels, file size: 229 KB, MIME type: image/jpeg)
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
|
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, 1930.
 Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:31, 11 February 2020 | | 1,968 × 1,036 (229 KB) | shared>Barabbas1312 | User created page with UploadWizard |
File usage
The following page uses this file:
