ample of the class of edge is determined by the length of the pipe of the instruments in which musical soundsare produced by instrument, the length being varied to produce the the vibration of bars or tongues which are rigidly held different notes, by opening or closing the finger holes. at one end… … Sayart determined that the lowest note appreciable produced by a stopped pipe is an octave below the MUSIC BOX. by the ear is produced by from seven to eight complete note yielded by an open pipe of the same length, and edge of a steel plate, forming a comb, which is ar- vibrajtipns p^r second, and…
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten03unit-626-0.webp)
