age, must be rapid in the extreme. Ships no doubt will skim the surface of the sea instead of resting upon it. But air-ships are not very likely to be anything but a sort of vast toy, within, at all events, the next hundred years.
But, as a means of amusement, the idea of aërial travel has great promise. Small one-man flying-machines, or the aërial counterpart of tandem bicycles, will no doubt be common enough. We shall fly for pleasure; and just as thousands of working men and women now take a Saturday-afternoon spin on a bicycle, so they will go for a sky-trip, and visit interesting mountain-tops for (non-alcoholic) picnics. The bicycle or the motor-cycle will perhaps be the point of development. It is quite certain that within the next ten or fifteen years some means will have been discovered by which we can ride on a single wheel. The saving of weight thus effected will go a long way towards surmounting the flight problem. Then, when motor-unicycles are presently propelled by force transmitted (in the same way as Marconi's telegrams) from a fixed power-house, the difficulty of flight will be within sight of an easy solution. Any competent mechanician of the present day could design a flying-machine if the mere weight of the motive appliance could be overcome. When the motor is fixed on terra firma, and the vehicle only needs to carry
