“By thus providing the bicycle with a circular track engaging the driving-wheel the said track forms virtually the driving-wheel of the bicycle or velocipede, and as it is of very greatly increased diameter as compared with the driving-wheel of the velocipede, it enables the machine to be driven over rough and uneven roads without violent bumping and jolting, and without discomfort to the rider. It also prevents the velocipede from being overturned when it encounters an obstruction, and prevents the rider from ‘taking a header.’ “When the machine encounters a stone or other obstruction, the frame _M_ is moved rearwardly against the pressure of the spring _L′_, and thus causing the wheel _B_ and the rider to be moved forwardly past the centre of the circular track for a corresponding distance, thus enabling the weight of the rider to be utilized in causing the circular track to pass over the obstruction.” * * * * * This patent is a fair sample of the big-wheel idea; it has some good features, such as the spring _L′_, which allows the inside machine, together with the rider, to swing forward when the outer wheel strikes an obstacle, thus acting as an anti-vibrator or momentum spring. The small inner wheel with cranks would make the machine run slow, but the appearance of the thing would be, I think, rather unique. [Illustration: C. A. Williamson. Seat for bicycles. No. 364,075. Patented May 31, 1887.] “The advantages of my back support or rest for a bicycle seat will be readily understood by users of the machine. “Instead of folding the rest down upon the seat as shown, it might be arranged to be folded down behind the seat, if desired. “I am aware that various forms of seats have been provided with hinged back-rests, and do not claim, broadly, a seat having a hinged back-rest. “I claim as my invention— “In combination with the frame and an ordinary seat of a bicycle, an arm secured at one end to the frame under the seat and extending upwardly at the back of the seat, and a back-rest located behind the seat and having hinge-connection with the arm above the top of the seat, whereby it is adapted to be folded down, substantially as set forth. “+Catherine A. Williamson.+” * * * * * Miss Williamson is mistaken in her disclaimer. I do not think anybody ever put a back on a bicycle seat before. It is also probable that a “dis” (before advantages) was omitted by the printer in the first line of above brief; but we must not be ungallant to the ladies, and criticise too harshly. Perhaps the invention will come in on the Rovers where the ladies may mount in front. [Illustration: C. E. Duryea, of St. Louis. Bicycle. No. 364,231. Patented June 7, 1887.] DURYEA SPECIFICATION.