o exist in the two devices: is described, as the original discovery by the author, a new Edison. Hughes. a little common house fly as it walks along the board are telephone, remarkable for its simplicity and its astonish- eo heard with unmistakable distinctness by a person whose ear ee] | Plate. |… … The discovery on which all this is based seems to us close- ly similar to that made over a year ago by Edison. He found that, when properly prepared, carbon possesses the remarkable property of changing its resistance with pressure, and that the ratios of these changes, moreover, correspond exactly…
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