Wikipedia

File:Panama Canal Lock Forms.jpeg

Panama_Canal_Lock_Forms.jpeg ‎(556 × 369 pixels, file size: 56 KB, MIME type: image/jpeg)

Summary

The Panama Canal locks under construction in 1910. In the foreground are shown the huge, collapsible steel forms used to mould the culverts into the side walls; behind can be seen the towering wall forms, mounted on rails to allow the locks to be constructed in sections. Each of these was 78 feet high and 36 feet wide.

From The Panama Canal, An address to the National Geographic Society, by Colonel Goethals, February 10, 1911.

Licensing

Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current19:31, 2 November 2005Thumbnail for version as of 19:31, 2 November 2005556 × 369 (56 KB)JohantheghostThe Panama Canal locks under construction in 1910. In the foreground are shown the huge, collapsible steel forms used to mould the culverts into the side walls; behind can be seen the towering wall forms, mounted on rails
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Global file usage

The following other wikis use this file:

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Retrieved from "https://en.wikipedia.org/wiki/File:Panama_Canal_Lock_Forms.jpeg"