If all the notes in the human voice wore thus recorded, the record should, with practice, be easily legible, so that it would render shorthand writing superfluous, and a book could be printed without ever being written, Both music and speech can be reproduced from these by means of selenium, on ineiple of the optophone—Invention of Dr. d'Albe's— and a slight modification of the records would make it possible to etch the notes as perforations and use the record as a musieroll for the player-piano,
Text read from the printed page and cleaned; old type leaves the occasional error.