"General Hazen and I," said the professor, "once planned that some day, when we got an appropriation, we would go up in a balloon having a capacity of, say, forty thousand cubic feet, but carrying at the ground only ten thousand cubic feet of hydrogen—in other words, in a shrunken, quarter-filled balloon. Of course as we rose and the air became rarefied this hydrogen would expand against the decreasing air-pressure, and at a height of two miles our original ten thousand feet of gas might have swelled to twenty thousand feet, at five miles to thirty thousand feet, and so on. The last ten thousand feet of expansion would have brought us to no one knows what height, but certainly, we calculated, to the greatest height ever reached by a balloonist."
He explained that the balloon record of seven miles claimed for Glaischer and Coxwell, the English aëronauts, is not reliable, since the barometer used in that famous ascension (it was made at Wolverhampton, England, in 1862) could not register above five miles, and what was accomplished beyond that height is matter of pure conjecture and must be less than might be done by the Hazen-Myers plan, since Glaischer's balloon (by a serious oversight) was started on its flight nearly full of hydrogen, instead of nearly empty.
"Oh," exclaimed the professor, with regretful look, "why don't some of our very rich men think of these things!"
IV
THE STORY OF A BOY WHO RAN AWAY IN A BIG BALLOON
ONE of the professor's hobbies is that gas-balloons are better and safer than the hot-air kind, although the latter cost less to operate. Your hot-air balloon goes up with a rush, but comes down again as soon as it cools; and in the coming down lies the danger. A gas-balloon, on the other hand, stays up as long as you keep gas in it, and the professor's secret of varnishing holds gas like a trap.
As to the ordinary use of hot-air balloons for parachute dropping, the professor has only condemnation. A parachute, says he, is a sin and a disgrace—a thing to be prohibited by law. The parachute kills more people every year (the professor still is talking) than many a battle, and kills them in unpleasant ways: drops them on live electric wires, which shock them to death; drops them in lakes, where they are drowned, or in the ocean, where they are eaten by sharks; drops them in trees, where they catch by their coat-collars and choke to death; drops them on sharp railings, which spear them through; drops them—but the professor's list (backed by statistics, be it said) is too long and gruesome. It is only fair to add that I have a friend, Leo Stevens, a professional aëronaut, who has made thousands of drops from hot-air balloons and claims that nothing is safer than a parachute, and says he can steer one in its downward sailing so as to avoid dangerous landing-places, although he does admit numerous hair-breadth escapes, as when he dropped from a parachute two miles out at sea, this at Long Branch in 1898, and was only saved by his life-preserver and the courage of some fishermen, or again when De Ive, his partner in ballooning ventures, dropped with him on one occasion from a big balloon (one parachute was suspended on either side), and landed in Lake Canandaigua and was drowned. "Oh, there's no doubt a man takes chances on a parachute," said Stevens, "but I like it."
There is a singular thing about parachutes, Stevens contends, not sufficiently considered by Professor Myers in his experiments. The professor, with his usual thoroughness, has tested all shapes and kinds of parachutes by dropping them from a captive balloon with a sand-bag hitched on instead of a man. The dropping was done by a fuse which would burn the supporting rope and at a given moment set the parachute free, just as a man under the parachute would cut it free. And in a large number of cases the parachute did not open in time to save the sand-bag man from destruction on the ground.