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Updated: June 15, 2025
Why, you've only got to stick up a lot o' posts with insulators screwed to 'em, fix wires to the insulators, clap on an electric battery and a telegraph instrument, and fire away." "Robin, what are insulators?" asked Madge, with a puzzled look. "Madge," replied Robin, with a self-satisfied expression on his pert face, "this is the three-hundred-thousandth time I have explained that to you."
But visibly and inexorably the pilot gyros followed the unseen sun, and they would have resisted with a force of very many tons any attempt to move them aside by so little as one-tenth of a second of arc, which would mean something like one three-hundred-thousandth of a right angle.
Edison finally decided to apply a preliminary metallic coating of infinitesimal thinness, and accomplished this object by a remarkable process known as the vacuous deposit. With this he applied to the original record a film of gold probably no thicker than one three-hundred-thousandth of an inch, or several hundred times less than the depth of an average wave.
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