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Most of the critics form non-conductors to the passage of what has been regarded as analogous to an electrical current, and their non-conductivity is very little greater than that of many of the people who receive complimentary tickets or have the honour of being on the first-night list.
During the night heavy rain fell, and all the country was drenched. The telegraph-wire had been laid along the ground, as there had been no time to pole it. The sand when dry is a sufficient insulator, but when wet its non-conductivity is destroyed.
To go to the southward of a clump of dense evergreens is as good as a trip to Bermuda. On such a day the noon fire is a pastime rather than a necessity, though the making of a luxurious lunch may require heat. To tramp a spot on the snow with the snowshoes and then start a fire on it is to demonstrate the non-conductivity of this ermine mantle of the woods.
Many think that in some way they are able to generate an intense heat in a chamber of practically absolute non-conductivity. This intense heat they project in a parallel beam against any object they choose, by means of a polished parabolic mirror of unknown composition, much as the parabolic mirror of a lighthouse projects a beam of light. But no one has absolutely proved these details.
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