Page:Travel by Balloon.pdf/5

 ditions. I believe it could be done with a smaller balloon than that with which experimented on the Lake of Geneva. A powerful motor, giving several hundred horse-power, would be necessary, but big motors are lighter in proportion than small ones, and a suitable motor could doubtless be made.

For a long journey like that between and America you would require a  balloon, capable of resisting a certain amount of rough weather and able to rise and fall easily, so that the aeronaut could seek his own currents. If you rise to a height of 5.000 yards from the ground, you