“During the maple sugar season of the spring of 1858, a well-to-do farmer, of western New York, whittled out a spiral or augur-like screw-propeller, in miniature, which he thought admirably adapted to the canal. He soon after went to Buffalo, and contracted for a boat to be built, with two of his Archimedean screws for propulsion by steam. Although advised by his builders to substitute the common four-bladed propellers, he adhered to his original design, and with one propeller at either side of the rudder- called “twin-propellers”-she was soon ready for duty. She is the vessel known to history as the Charles Wack. She carried three-fourths cargo and towed another boat with full cargo, and made the trip from Buffalo to West Troy in seven days, total time, averaging two miles per hour. But she returned from Troy to Buffalo, with half freight, in four days and sixteen hours, net time; averaging three and one-twelfth miles per hour, without tow. ”