The best-known of Joule's experiments was that in which a brass paddle consisting of eight arms rotated in a cylindrical vessel of water containing four fixed vanes, which allowed the passage of the arms of the paddle but prevented the water from rotating as a whole.
I pursued with a paddle and he dived, but when he came up I was nearer than before.
Hiding his canoe, still afloat, among these thickets, with its prow seaward, he sat down in the stern, paddle low in hand; and when the ship was gliding by, like a flash he darted out; gained her side; with one backward dash of his foot capsized and sank his canoe; climbed up the chains; and throwing himself at full length upon the deck, grappled a ring-bolt there, and swore not to let it go, though hacked in pieces.
The paddle was driven by weights, and the temperature of the water was observed by thermometers which could indicate 2 kuth of a degree Fahrenheit.
Special reversible paddle steamers (called doubleenders) were designed for service in the inlets and estuaries, and sixty-six ironclads were built and employed during the four years.
After a great deal of tinkering and trying, they did succeed in making two paddle wheels.
When the work was finished, the old fishing boat looked rather odd, with a paddle wheel on each side which dipped just a few inches into the water.
This needle is suspended by a fine platinum silver wire, and its normal position is such that the aluminium paddle blades are just outside the quadrantal-shaped plates.
He took something like an oarlock from his pocket and fastened it to the stern of the boat; then with a paddle which worked in this oarlock one of the boys could guide the boat while the other turned the paddle wheels.
The steamers are flatbottomed paddle boats drawing 3 ft.