| Show ACOUSTICS discovery No nineteenth of in the theoretical prInciples ml of more sound and sound waves Is in It Itself interest or more Of self than the practical applicatIon those principles made by Thomas Edison in the phonograph ago the theas centurY than a More in that all as made eluding the infinitelY due It the human voice W of bY YS successive trim waves set tip unit before vibrating substanCes cent dyed sons time it trail never been mea to by any reproduce these complex Words of the exactly as to cause the heard origInal speaker to be till their quite intelligibly and ith at tones arid Yet the place time or line performed tins miracle that of Tire basIc principle like Ut telephOne Is a dIaphragm In Instead by the but the at a stead of being reproduced by en current are point permanently by a steel a aline of hard cuts upon a cylinder In dePth SC line spiral groose varyIng the cording to tire et i back This cylinder the motion reproduces in the same series of the groOVes cut tiona as those which Of the r same is in Its The of coUe Its In fancy What maY be tO the contributing function in welfare of the or the STe only guess |
