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Updated: May 13, 2025
I carried three hundred pounds of ballast, in bags; the car, perfectly round, four feet in diameter, and three feet in height, was conveniently attached; the cord which sustained it was symmetrically extended from the upper hemisphere of the aerostat; the compass was in its place, the barometer suspended to the iron hoop which surrounded the supporting cord, at a distance of eight feet above the car; the anchor carefully prepared; all was in readiness for our departure.
He contented himself with a half-smile, and continued in his interrogative style, "Perhaps you ask if to this power of the "Albatross" to move horizontally there is added an equal power of vertical movement in a word, if, when, we visit the higher zones of the atmosphere, we can compete with an aerostat? Well, I should not advise you to enter the "Go-Ahead" against her!"
To destroy the air-ships seemed an impossibility, since they could move at five times the speed of the swiftest aerostat, and yet to return to the bombardment of the city was to leave them free to commit what havoc they pleased upon the encampments of the armies of the League.
It is essential that the balloon should assume a vertical line in relation to its winding plant upon the ground beneath, so that it may attain the maximum elevation possible: in other words, the balloon should be directly above the station below, so that if 100 yards of cable are paid out the aerostat may be 100 yards above the ground.
This took but a few seconds, comparatively speaking, though, doubtless, each moment seemed an age to the rescued stranger. Then the professor slowed his ship, looking around in order to determine upon the wisest route to take. For one thing, it would be severe work to draw the stranger bodily up and into the aerostat.
In order to descend, Pilatre attempted to open the valve of the aerostat; but the cord of this valve caught in the balloon, and tore it so that it was emptied in an instant. It fell on the mongolfier, overturned it, and the imprudent men were dashed to pieces in a few seconds. It is frightful, is it not?" said the unknown, shaking me from my torpor.
This time the aerostat was brought directly above the Temple of the Sun, where there appeared to be some unusual disturbance, a number of armed guards fairly driving a gaily arrayed Indian down to the lower levels, and that greatly against his inclinations, judging from the harsh cries and ringing threats which burst from his lips.
If the aerostat finds support in the air it belongs to the medium in which it moves; under such conditions, how can its mass, which offers so much resistance to the currents of the atmosphere, make its way against the wind? In this struggle of the inventors after a light and powerful motor, the Americans had most nearly attained what they sought.
But do the many tales of sorcerers in the Middle Ages, who rose from the ground with their cloaks apparently filled with wind, to awe the rabble, suggest that they had deduced the principle of the aerostat from watching the action of smoke as did the Montgolfiers hundreds of years later?
In the Turner yard at Philadelphia there reposed an enormous aerostat, whose strength had been tried by highly compressed air. It well merited the name of the monster balloon. How large was Nadar's Geant? Six thousand cubic meters. How large was John Wise's balloon? Twenty thousand cubic meters. How large was the Giffard balloon at the 1878 Exhibition? Twenty-five thousand cubic meters.
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