Page:Heroes of the telegraph (IA cu31924031222494).djvu/247

 the expression, and the modulation, so that one has to be careful how one speaks, and probably its use will help us to improve our utterance.

By speaking into the phonograph and reproducing the words, we are enabled for the first time to hear ourselves speak as others hear us; for the vibrations of the head are understood to mask the voice a little to our own ears. Moreover, by altering the speed of the barrel the voice can be altered, music can be executed in slow or quick time, however it is played, inaudible notes can be raised or lowered, as the case may be, to audibility. The phonograph will register notes as low as ten vibrations a second, whereas it is well known the lowest note audible to the human ear is sixteen vibrations a second. The instrument is equally capable of service and entertainment. It can be used as a stenograph, or shorthand-writer. A business man, for instance, can dictate his letters or instructions into it, and they can be copied out by his secretary. Callers can leave a verbal message in the phonograph instead of a note. An editor or journalist can dictate articles, which may be written out or composed by the printer, word by word, as they are spoken by the reproducer in his ears.

Correspondence can be carried on by phonograms, distant friends and lovers being able thus to hear each other's accents as though they were together, a result more conducive to harmony and good feeling than letter-writing. In matters of business and diplomacy the phonogram will teach its users to be brief, accurate, and honest in their speech; for the phonograph is a mechanical memory more faithful than the living one. Its evidence may even be taken in a court of law in place of documents, and it is conceivable that some important action might be settled by the voice of this Deus ex machinâ. Will it therefore add a new