Page:Wonderful Balloon Ascents, 1870.djvu/181

Rh turbine water-wheels, where perhaps 970 cubic feet of water are utilised by means of a mechanism not larger than a hat, we see another illustration of it, with this difference, that water takes the place of wind as the motive power.

"The aerial screw is beset with great difficulties, but if we can succeed through its agency in raising even the smallest weight, we may be confident of being able to raise a heavier one, for a large machine is always more powerful in proportion to its size than a small one.

"Mdlle. Garnerin once made a bet that she would guide herself in her descent from a considerable altitude towards a fixed spot on the earth at some distance, with no other help than the parachute; and she was really able to guide herself to within a few feet of the specified spot, by simply altering the inclination of the parachute.

"From observations in mountainous districts, where large birds of prey may be seen to the best advantage hovering with outstretched wings, I have come to the conclusion that they first of all attain the requisite height and then, extending their wings in the form of a parachute, let themselves glide gradually towards the desired spot. Marshal Niel confirms this opinion by his experience in the mountains of Algeria. It is, therefore, clear from these examples that we should possess the power of transporting ourselves from place to place if we could only discover a means of raising a weight perpendicularly in the air, which would then act as a capital of power, only requiring to be expended at will."

From the foregoing remarks we may gather an idea of the importance which may be attached to aerial locomotion notwithstanding the successive failures of all those who have hitherto taken up the subject. We come now to the description of the memorable ascent of the "Géant."