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It was a simple matter for the boys to wind the loop aerial, for they had become expert in the manipulation of wire, tape, and the numerous other accessories that go with the art of wireless telephony.

Of course, it was out of the question to erect an outdoor aerial, but they were not bothered by this and decided to use a loop aerial instead.

“I’ll go and get the loop aerial, Bob, and we can test it right now,” suggested Joe.

Conspicuous atop the cabin was a big loop aerial.

“Why, you thick heads,” replied Jimmy, with more force than politeness, “don’t you know that you don’t have to have a lightning arrester with a loop aerial?”