In answer to the idea advanced that the fault is due to the mere size of the wheel,—that a large one has more surface exposed to contact, etc., and will hold better,—the writer has noticed very little difference in his thirty-eight-inch narrow-tread front-driving pattern as compared with a fifty-two-inch Ordinary; if there is any difference caused by the size of the wheel, this fourteen inches ought to have shown itself more than it did. If the small wheel in a bicycle is a cause for slipping, we could naturally ask why it does not show itself more in the rear wheel of the Ordinary. It may be said, in answer to this, that there is but little weight on it, and that, not being a driver, whatever capers it might choose to cut are ignored by its regal, imperturbable leader; hence, if the rear wheel slips, it is immediately drawn up in line again. Another plea is that the lack of weight on the front wheel of the Safety makes it slip, and then it carries the rear wheel with it. To the last I can simply reply, as I would to the _Cyclist’s_ notion of the slanting fork, that it is the rear wheel which slips first, last, and all the time, or else a large majority of riders are very much misled, and really can’t tell what is going on under them. Certainly we must say that if appearances and sensations of the riders are worth anything, the doctrine of the front wheel slipping first must go to the wall and carry several ingenious solutions with it. Still another bright speculation is, that the unusual bumping of the front wheel holds it back, and the rear pushing on, for the nonce, cannot go forward, hence it must go sideways. If we admit that the American Star does not slip, then the theories of small weight on the front wheel, the slanting fork, and front bumper must all go for naught. There are some other qualifications, however, which would modify or exclude the Star as a reference. The fork is slanting to a greater extent than in any other machine, but the small front steerer is swung from a point directly above the centre, which, it is said, gives the wheel a better chance to caster. To our ingenious front-bumper friend, I would also suggest the trial of a first-class anti-vibrator to the fork, which will let it spring back a good way. And again, it has been stated, in regard to the Rover slip, that the large rear wheel swings from side to side, or wabbles, humorously likened by some to the wagging of a duck’s tail. This feeling of disturbance in the rear part of the machine is felt in the Ordinary when supplied with the large rear wheel advocated by some, and it may have something to do with the slip, though it is hardly possible that it would in the well-built, steady machines of the present time.