“A couple of scientific enthusiasts, of the kind we call cranks--I don’t know what you call them on the earth--conceived the idea that they could find something better to take the place of the highly purified and buoyant gases which we used in our flying machines. They observed, in the lofty flights they were accustomed to make into the air, that as they ascended the atmosphere grew lighter, and this led them to think they might go far into the upper regions, collect large quantities of rarefied air, bring it down, and use it for floating flying machines. Of course, they understood that any vessel this thin air was put into must be strong enough to prevent being collapsed by the weight of the denser atmosphere on the surface. But they thought small spherical vessels of very thin metal could be made that would withstand this pressure and still hold enough to float and carry some weight besides. They had a large number of these hollow balls made and started on a trial trip, expecting to bring down only a small quantity each time. But, in their endeavor to obtain the very best quality of lifting material possible, they went much higher than they intended, although this did not cause them as much inconvenience as might have been expected, since they were provided with the latest improved breathing apparatus. The result of their adventure, however, was a discovery of such magnitude that it drove from their minds all thought of their real errand and we never again heard of that project. After remaining at an extreme height a few hours, the surface of the planet being hidden by clouds, they began to descend, and when they were near enough to see the features of the country below them, everything looked strange and unknown. They could not account for this, but continued their fall, fully persuaded that it must be their own world and not some other which they were approaching. But even if they had not been correct in that, they could hardly have been more surprised than they were to find, on landing, that they were almost exactly on the opposite side of the globe from the place where they made the ascent. They seemed to have traveled half way around the world in that incredibly short space of time, when in reality they had remained stationary and the world had traveled around them. The fact is, they had risen above all the denser portion of the planet’s atmosphere, and had reached a stratum of extremely rarefied air, which, it seems, does not accompany the globe in its revolution. Of course, the facts were at once heralded to the four quarters of the world, and the two aerial travelers found themselves famous. But they did not wish to let such an astounding discovery rest upon the results of a single experiment, and so they proved themselves worthy of their new fame by going home the way they came. That is, they mounted their flying machine, rose again to the same lofty height, remained there about the