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Updated: May 25, 2025
"We'll not do that," cried the boys in chorus. Nevertheless in spite of the promise there were few opportunities during the next few days for either of them to go a-visiting. The New York electricians arrived and with them came aerials, generators, detectors, tuners, insulators, amplifiers, and all the hundred and one parts necessary for a perfectly equipped radio station. Mr.
A group of wires in parallels, called "aerials," are hung in the air at one point, or station, and a similar set is suspended at the other station. The electrical current jumps through the air from one group of wires to the other, without being directly connected, hence the name "wireless," though really some wires are used.
"Reports received this morning indicate that by night the engineers will have put the road through to a selected point where you will have the least difficulty in concealing your tractor and its aerials. From your position there you will keep constant vigil, for you will be able to inform us long in advance of any effort of the Boches to come through that way.
Then one of our rays caught the man; his figure crumpled; the shower of sparks as his barrage was broken, exploded like a tiny bursting bomb; and as the sparks died, there was nothing where the man had been. A suicide; but one of our aerials was shattered. And then others came down not many, for it was grim business and the courage of them must have failed at the last.
"The other fellows are figuring that about five dollars apiece will buy most of the things we'll need at first, anyway," he added, with a careful eye to the future. "All right, here it is," said Mr. Plummer. "And I suppose the next thing we know you'll be breaking your neck falling off the roof while you're trying to put up aerials, or whatever it is they call the contraptions."
The wireless apparatus was brought out, the small balloon inflated, and it carried aloft the aerials. Then, while the call for aid was being sent out, Lieutenants Wilson and Larson were made as comfortable as possible, and some of Uncle Ezra's scratches and bruises were looked after. "No more airships for me," he said bitterly, though with a chastened spirit.
He set up poles at the opposite sides of the garden and on them mounted the simple sending and receiving instruments which were then available, using plates of tin for his aerials. He set up a simple spark-gap, as had Hertz, and used a receiving device little more elaborate. A Morse telegraph-key was placed in circuit with the spark-gap.
"Do you mean to say that a storm that wasn't round here at all could " burst out Jerry, then stopped embarrassed. "Indeed it could," replied Bob, answering the unfinished question. "You see thunderstorms cause powerful electrical waves that affect apparatus miles and miles distant. Of course such waves vary in length but nevertheless they act on all aerials to a greater or less degree.
But when he looked for wire to fashion an aerial, his face grew black. The intruder had taken both aerial and lead-in wire, and Charley hadn't a hundred feet of wire left in the place. What should he do? What could he do? Again he paused and pondered. And again an idea came to him. "They use trees for aerials," he muttered, "and they make perfect ones to receive by.
"The ground helps a lot in radio work," continued he. "In fact were it not for good old Mother Earth furnishing her aid, we should have no wireless at all. One side of our circuit passes through the ground and the other half, which completes it, goes through the air between the aerials of the different stations.
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