The Professor showed a disposition to quiz the young aviator, who met him as best he could, though sensible of his lack of knowledge as compared with one who had given so much thought and experimentation to it.
“Naturally,” said he, “men’s first ideas were of using wings as birds do, but it would take a Samson or a Hercules to put forth the necessary strength. But it has been tried times without number. I think the ancient Greeks wove many romantic tales of aerial flights—”
The Professor paused and Harvey accepted the invitation:
“Such as Daedalus and Icarus, who were said to have flown to the sun and back again. The Greek Achytus made a dove of wood, driven by heated air, and one of his countrymen constructed a brass fly which kept above the ground for some minutes.”
“Do you recall what aviator first came to grief?”
“‘Simon the Magician,’ who during the reign of the emperor Nero made a short flight before a Roman crowd but tumbled to death, as did a good many during the Middle Ages.”
“The Chinese were centuries ahead of the rest of the world in the use of the mariner’s compass, printing, gunpowder and the flying of kites. There are authentic records of balloon flights in the fourteenth century, and a hundred years later discoveries were made of which present aviators have taken advantage. You have learned that although America was visited a thousand years ago and even earlier by white men, the glory of the discovery is given to Christopher Columbus. So the credit of the first real step in aviation belongs to two Frenchmen. Can you help me to recall their names?”
“I don’t think you need any help,” laughed Harvey, who saw the drift of his friend’s quizzing, “but the men you have in mind were Joseph and Etienne Montgolfier, who lived at Annonay, about forty miles from Lyons.”
“What was their idea of aerostation?”
“They learned from many experiments that a light globe filled with hot air will rise because its weight is less than the surrounding atmosphere, just as a cork or bit of pine comes to the surface of water. They made a globular ball, thirty-five feet in diameter, of varnished silk, and in June, 1783, in the presence of an immense crowd at Annonay built a fire under the mouth on the lower side. Soon after when the ropes were loosened, the balloon mounted upward for more than a mile, then was carried to one side by a current of air and as the vapor within cooled, came gently down to earth again.