I dropped my bag and trudged up the well remembered path to the laboratory. It had been enlarged somewhat since I saw it last and, late though the hour was, there was a bustle in the air and I could see a number of men working in the building. From an area in the rear, which was lighted by huge flood lights, came the staccato tattoo of a riveter. I walked up to the front of the laboratory and entered. I knew the way to Carpenter's office and I went directly there and knocked.
"Hello, First Mortgage!" cried Jim Carpenter as I entered in response to his call. "I'm glad to see you. Excuse the bruskness of my first greeting to you over the telephone, but the press have been deviling me all day, every man jack of them trying to steal a march on the rest. I am going to open the whole shebang at nine to-morrow and give them all an equal chance to look things over before I turn the current on at noon. As soon as we have a little chat, I'll show you over the works."
After half an hour's chat he rose. "Come along, First Mortgage," he said, "we'll go out and look the place over and I'll explain everything. If my ideas work out, you'll have no chance to go over it to-morrow, so I want you to see it now."
I had no chance to ask him what he meant by this remark, for he walked rapidly from the laboratory and I perforce followed him. He led the way to the patch of lighted ground behind the building where the riveting machine was still beating out its monotonous cacaphony and paused by the first of a series of huge reflectors, which were arranged in a circle.
"Here is the start of the thing," he said. "There are two hundred and fifty of these reflectors arranged in a circle four hundred yards in diameter. Each of them is an opened parabola of such spread that their beams will cover an area ten yards in diameter at fifty miles above the earth. If my calculations are correct they should penetrate through the layer at an average speed of fifteen miles per hour per unit, and by two o'clock to-morrow afternoon, the road to space should be open."
"What is your power?" I asked.
"Nothing but a concentration of infra-red rays. The heaviside layer, as you doubtless know, is a liquid and, I think, an organic liquid. If I am right in that thought, the infra-red will cut through it like a knife through cheese."
"If it is a liquid, how will you prevent it from flowing back into the hole you have opened?" I asked.
"When the current is first turned on, each reflector will bear on the same point. Notice that they are moveable. They are arranged so that they move together. As soon as the first hole is bored through, they will move by clockwork, extending the opening until each points vertically upward and the hole is four hundred yards in diameter. I am positive that there will be no rapid flow even after the current is turned off, for I believe that the liquid is about as mobile as petroleum jelley. Should it close, however, it would take only a couple of hours to open it again to allow the space flyer to return."