Show silent telephone the blunt silent tei telephone ephone Is an which hai has teen designed for the pup pur poise of lerr exchange of coro com between deaf and dumb persone it has been invented 11 by william wililam 11 of cambridge mass abid val wag stricken deaf and dumb ir as a result ofin of in illness in childhood the new device consists of a bank of elec eliric we light tach luscri inscribed bed with a letter or some diameter niad made use of la in the ao 1 s deaf and dumb language thee theme are connected with a ke keyboard board and with the combination it la Is very convenient to exchange messages between betseen persons N who ho cab cau neither hear bear nor speak |