said, is carefully preserved to the present day. The success of this boat was very gratifying, but it was only on a small scale, the cylinder being only four inches in diameter. In 1789, Mr. Symington again, under the direction of Mr. Miller, fitted up an engine on a double boat sixty feet long. This canalboat, on the Forth and Clyde canal, went at the rate of seven miles per hour, and was very promising, as an experiment, on the canal, a placid water, but could not be employed on the river; for unfortunately the boat was too weak for the machinery, which was taken out, and Mr. Miller tried no more experiments. A work published by his son states that out of his private fortune Mr. Miller spent no less than $150,000, making experiments for which he never received in return a single cent. He was a patriot in mechanical science.