Roper's "velocipede" arrived in 1869. The hickory-framed bicycle powered by a twin-cylinder steam boiler was operated by twisting a throttle mounted to the handlebar — a convention so pure it ...

He says " I can turn it in less space than any other velocipede ever made. The leading or steering wheel is thirty-two inches in diameter, hung upon a swivel (as the front wheel of the bicycle ...

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