Buoyancy and speed are two features of this bicycle boat which was built for vacationists at a lake near Chicago and used a whole season. It consists of two pontoons and an old bicycle frame, held centrally above and between the former. Propulsion is obtained by the use of a ring-and-pinion gear, bolted to the pedal sprocket, and a small three—blade propeller connected to the gears by a suitable shafting.
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