English: Automatic sluice gate mechanism at the Greenock Cut aqueduct leading from Loch Thom. When the aqueduct is over full, water flows down the pipe in the foreground and fills the bucket, which then pulls the chain down over the pulley wheel and lifts the counterweight and the lever opening the sluice gate. Small holes in the bucket allow the water to drain slowly out, so when the inflow stops the counterweight eventually pulls the sluice gate lever down and lifts the empty bucket.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.