This is attempt #2 and I am still grumpy, so this will not be as long or as interesting as the one I did before that got deleted, but I'm trying.
A couple days ago, Moss, Papa and I went on a walk down the canals. We ended up at a lock entering the Thames. Moss and I got to open and close the lock for many boats.
HOW LOCKS WORK:
In front of the lock, in the canal, the boats line up waiting their turn to enter the Thames. Someone from the boat will get off and work the lock (in this case Moss and I).
You'll open a small gate for the water to flow through, into the small canal space which has a gate on each side. This works because the water always flows into the open space. This makes the small canal area level to the canal.
Now you'll pull the big wooden lever to open the gate, to let the boat through.
Small pause to show HOW LEVERS WORK:
Think about trying to lift a big metal bar with two fingers. Hard, right? But, if you have two more metal bars,and put one horizontally in front of the metal bar you're trying to lift, and put the other one on top of that bar, and under the one you're trying to lift, then push on it. That makes it easier to carry, that's a lever.
BACK TO HOW LOCKS WORK:
Once the boat is inside the small canal area, you'll push the lever to close the gate behind the boat. After, you need to get the small canal area level to the themes. So you proceed to open the little gate to let the water out. Therefor the water will be even. Open the gate again for the boat to get through, and close the gate behind it.
Done!
please comment for any questions.
