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 in proper position by means of the flanges B of the rolling wheels as shown. By this means the track is laid in front of the wheels, and passes over from the rear of the same in an endless belt, as shown. The guide rails G are supported above the traction wheels by means of arms e, as shown, and prevent the jointed track from leaving the flanges." It is a great thing to be able to have a smooth road everywhere, carrying it as a part of the baggage, but perhaps most of us will be contented to take the road as it comes on our bicycles as they are, thanking Mr. Gleason all the same.

In 1869 another American, Mr. Richard Hemmings, made an attempt in which he had both predecessors and followers. Many people have been struck with the notion of using one big wheel only, the centre being made open to contain the rider. It would be rash to guess at the number of patents taken out with this central idea, but all have been failures—few of the inventors even taking the troUble to provide a means of steerage. Mr. Hemmings' is one of these. His outer wheel, it will be seen, runs loosely upon the rollers of his inner framework. His feet hang in stirrups, and as he turns the wheel c the band G drives the wheel B'. Whether the latter wheel drives the outer by friction WASA or cogs, or whether it is intended to move the machine by continually impelling the weight forward is not quite clear, but there sits Mr. Hemmings in the picture, and if it never became his fate so to sit in the actual machine—well, perhaps it saved him a lot of trouble after all.

But Mr. T. W. Ward, of New York, preferred to sit astride his one wheel. His ingenious dodge was to carry the forks below the bearings, and then to fasten weights whereby he might retain a dignified perpendicular. But, in his enthusiasm, Mr. Ward omitted to consider what sort of