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A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.
The work of art itself is in the public domain for the following reason: Public domain Public domain false false The author died in 1837, so 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 100 years or fewer .
Sequence of operation of a canal pound lock: Image title: Sequence of operation of a canal pound lock by CMG Lee: 1. Boat sailing upstream; 2. Boat enters lock; 3. Downstream gates close; 4 and 5. Chamber filled; 6. Upstream gates open; 7. Boat leaves lock. 8. Boat sailing downstream; 9. Boat enters lock; 10. Upstream gates close; 11 and 12 ...
A canal lock system in modern-day France which uses the pound lock system developed during the Song dynasty. In ancient China, the sluice gate, the canal lock, and flash lock had been known since at least the 1st century BCE (as sources then alluded that they were not new innovations), during the ancient Han dynasty (202 BCE–220 CE). [67]
The lock was converted to a timber-constructed pound lock in 1802 to improve navigation from the Thames into the River Kennet enabling boats to travel all the way to the Bristol area. The lock retains its manual beams (not the originals, new beams were fitted in 2006), so far avoiding the progress towards hydraulic power.
Image credits: surrealism.world Today's list is also full of contemporary surrealist creations. The pictures were collected and shared by Instagram page @surrealism.world, which currently has over ...
Academic art – Style of painting and sculpture; Anthropic units – Academic term in archaeology, social studies and measurement; Beauty – Characteristic that provides pleasure or satisfaction; Canon (basic principle), a rule or a body of rules or principles generally established as valid and fundamental in a field of art or philosophy
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