Abstract: The jump rope device is constructed with a pair of stations disposed in mirror-image facing relation and a pair of ropes which are connected between rotating arms of each station. Each station employs a stepper motor to rotate the radially disposed arms as well as a transmission for rotating the arms in an out-of-phase relation to create a double dutch effect. The end of each rope is secured to a cord which is wound about a rotatable drum within each radial arm so that the length of exposed rope may be adjusted to a user. Should a user step on a rope, the resulting tension in the rope and cord effects an unwinding of the cord from the drum thereby allowing the rope to break away from the arm of the station.

Abstract: A direct drawing type lithographic printing plate precursor comprising a water-resistant support having provided thereon an image-receiving layer, wherein the image-receiving layer is formed by film coating a dispersion prepared by wet dispersion processing, with a dispersion medium of a nonaqueous solvent, a mixture comprising at least dry zinc oxide, a binder resin and an organic compound which is soluble in the dispersion medium and contains at least one acid group selected from the group consisting of --CO.sub.2 H, --SO.sub.3 H and --PO.sub.3 H.sub.2, adding a water-soluble low molecular weight organic compound containing at least two or more --PO.sub.3 H.sub.2 groups, which can form a chelate compound with a zinc ion, and further effecting wet dispersion processing.