Show THE AGE OF MIRACLES the age of miracles returned to salt lake lahe city thursday night may 15 A large crowd sat eat spellbound spell bound aud and almost unbelieving in the auditorium of 0 the west high school as they saw and heard sergius P grace assistant vice president of the uell bell telephone laboratories inc inca of new mew york give a demonstration of marvelous discoveries in sound transmission at a public meeting sponsored by the utah section of the american institute of electrical engineers it mr ali grace had bad given such an ex hibi tion a tow hundred years ago he probably world would havo have been burned at the stake for witchcraft mr air grace came to salt lako lake city through the courtesy ot of president P F H u neta ot of the tha mountain states spates telephone and telegraph company the crowd ot of interested spectators saw tho the artificial larynx with which tho the voiceless now can speak and they hard it used they heard the music of 0 an orchestra filtered ath only certain tones being reproduced they heard a picture pass over a wire to be assembled at tho the receiving end they heard the palpitations of the heart of one of the tha audience magnified they heard how tho the bolso not so ot of the movement of a muscle would sound bound wore were the human ear sensitive enough to detect it they heard jazzy music inverted they liste listened fied to speech inverted and then transposed to its understandable form they heard speech scrambled into an unintelligible mass and then reassembled sem bled the sheard a voice at one cne end ot of a short telephone tele phona line and waited several eral seconds to hear it reproduced and finally filially they saw a demonstration in which music from a cabinet which could not be heard by the audience or the subject or of the test passed through a wire through ono mans body and into the subjects brain direct to prove that lie he heard the music the subject of the experiment beat time with hla lits hands As mr grace was demonstrating the device there was a roar through the room like a speeding train the sounds tremendously amplified coming from the contraction of mr graces jaw as he bit his teeth together they came through a microphone W which aich picked up the oise else produced by the contraction of 0 the muscles mr air grace explained that this phenomenon noni enon had recently been discovered in the and explained that it was attributable to tho fact that eardrum ear drum and surrounding tissues are made to act as one plate of the condenser receiver the resulting vibrations brat ions of the ear drum being interpreted by the brain as speech music or whatever sounds were impressed upon the original transmitter mr grace said that the sounds could be transmitted simultaneously to at least three persons holding hands it will not be long before you will go to a doctor when you have heart trouble and he will place a special stethoscope against your chest and listen grace said in connect connection lon with tho th reproduction of heart beats the doctor will than then got get out a record of heart beats which he thinks Is most like the sound of yours As soon as he finds the one which corresponds he will diagnose just what Is the trouble with your heart by comparing it with the records made by a famous heart specialist the artificial larynx was demonstrated with the aid of a bel bellows lovs the bellows mr air grace said would take the place of the wind which would come from the lungs ot of a dumb person the words were formed by the lips and the tongue and the air reproduced the sound with the use of 0 the artificial voice which much resembles former vice president dawes famous pipe you carry this voice around in your rocket pocket mr grace said one ot of the most amusing parts ot of the evening tor for the crowd was when mr air grace scrambled speech electrically inverting it ao so high notes were cowand low and low notes high speech wae dav then unintelligible but bat he showed that an electrical brain as ho he called it could unscramble the sounds and translate them into english in this scrambled gibberish the words playe feene oene spoken into the telephone were unscrambled and came out of the loud speaker as telephone company mr grace explained that this scrambling of words made t possible to send messages by radio which are unintelligible to anyone except the listener at the station which has receiving apparatus to unscramble the message |