Designed to afford communication .with « entombed miners who> were brought safety at Ironwood (Michigan), the Oliver Mining Company possesses what is believed to be.the smallest telephone in the world. It is smaller than a watch, but somewhat thicker than the: drill pipe which it was lowered into while rescue crews were, drilling through the solid rock to release the imprisoned m«n The telephone is liin. long, gin. wide, and liin. thick.
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Bibliographic details
Dominion, Volume 20, Issue 61, 6 December 1926, Page 14
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71Untitled Dominion, Volume 20, Issue 61, 6 December 1926, Page 14
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