s upon a common support, whose function is to render tions taken up by the disk from the speaker's voice crossing the beam once more parallel, or to concentrate it upon the the air. Prof. Bell hopes soon to settle this point, however, with Nature's translation of the text. disk of ebonite placed… … tion can go on with such ex- turing before the Royal In- Pig. 5.-THE ARTICULATING PHOTOPHONE-THE TRANSMITTER. cessive rapidity that beams of stitution Prof. Bell announced light falling on thesurfaceat the possibility of hearing a shadow fall upon a piece of selenium included in a tele- and…
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