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Screw Propellers

Soon after the Act of April, 1871, to foster and develop the inland commerce of the State, the steam canal-boat Cathcart was tried. She is like the Niagara of 1859, and has not been continued in the trade.

The canal-boat George Barnard, afterward called the Andrew H. Dawson, was tried, and has run through the season of 1872. She has a common propeller in her bow, with a recess from the water-line inclined to twenty feet aft to the bottom. Her propeller, therefore, forces the current against this incline and along the bottom in retardation of its progress. Hence, she cannot be expected to excel former trials.