Show an ancient telephone edison may read with interest that in 1783 M X binquet do da la a bastille issued a prospectus published in the correspondence spond spon dence enco secrete london 1788 vol ume nine 14 page of a singular machino machine or experience esperi ence of the propagation of sound and the voice through tubes prolonged to a great distance if it succeeded he announced people would be able to maintain with their sweethearts and friends at a distance of some hundreds of leagues a conversation which would become somewhat public on the way but by suppressing the names no oab one would be in the secret of the ingerl interlock tors but it is not recorded that the scheme was put into practice in a paper published in LIl for 1854 by M charles bourseul boursell Bour seul ho he says let us imagine that a person speaks near to a mobile plate sufficiently flexible not to lose any of the vibrations produced by his voice and that this plate interrupts and establishes accordingly communication with a battery then we ve might have at a distance another plate which would give at the same time the same vibrations an electrio electric battery two vibrating plates and a wire would be sufficient in apportioning the honors of telephonic honio discovery M Bour boursell Bourse seul nl at least would seem entitled to a share new york tribune |