No coin nor oath required. For personal study only.
Eleetrophone.--C. Ader uses a sort of" drum, having on one side a diaphragm of parchment paper, about 15 cm. (5"91 in.) in diameter, ill the centre of which are circularly arranged six bits of tinned iron, 1 cm. ('374 in.) long, and 2 nim. ('079 in.) wide. upon these act six microscopic horse-shoe electro-magnet~, Which are c~lineeted and set in action by a carbon-speaking microphone. A Lc~lanch~ pile of three elements transmits words and musi(, so that conversation can be heard 5 meters (!6"4 ft.) from the instrument. The energetic efforts are due to the minuteness of the eleetrormagnet.s, which, can be magnetized and demagnetized much more rapidly, than i.n other systems.--Comptes Rendus.
C.
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