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 MACHINA. Will it therefore add a new terror to modern life? Shall a visitor have to be careful what he says in a neighbour's house, in case his words are stored up in some concealed phonograph, just as his appearance may be registered by a detective camera? In ordinary life--no; for the phonograph has its limitations, like every other machine, and it is not sufficiently sensitive to record a conversation unless it is spoken close at hand.

But there is here a chance for the sensational novelist to hang a tale upon.

The 'interviewer' may make use of it to supply him with 'copy,' but this remains to be seen. There are practical difficulties in the way which need not be told over. Perhaps in railway trains, steamers, and other unsteady vehicles, it will be-used for communications. The telephone may yet be adapted to work in conjunction with it, so that a phonogram can be telephoned, or a telephone message recorded in the phonograph.

Such a 'telephonograph' is, however, a thing of the future. Wills and other private deeds may of course be executed by phonograph. Moreover, the loud-speaking instrument which Edison is engaged upon will probably be applied to advertising and communicating purposes. The hours of the day, for example, can be called out by a clock, the starting of a train announced, and the merits of a particular commodity descanted on. All these uses are possible; but it is in a literary sense that the phonograph is more interesting. Books can now be spoken by their authors, or a good elocutionist, and published in phonograms, which will appeal to the ear of the 'reader' instead of to his eye. 'On, four cylinders 8 inches long, with a diameter of 5,' says Edison, 'I can put the whole of NICHOLAS NICKLEBY.' To the invalid, especially, this use would come as a boon; and if the instrument were a loud speaker, a circle of listeners could be entertained. How interesting it would be to have NICHOLAS NICKLEBY read to us in the voice of Dickens, or TAM O'

SHANTER in that of Burns! If the idea is developed, we may perhaps have circulating libraries which issue phonograms, and there is already some talk of a phonographic newspaper which will prattle politics and scandal at the breakfast-table. Addresses, sermons, and political speeches may be delivered by the phonograph; languages taught, and dialects preserved; while the study of words cannot fail to benefit by its performance.

Musicians will now be able to record their improvisations by a phonograph placed near the instrument they are playing. There need in fact be no more 'lost chords.' Lovers of music, like the inventor himself, will be able to purchase songs and pieces, sung and played by eminent performers, and reproduce them in their own homes. Music-sellers will perhaps let them out, like books, and customers can choose their piece in the shop by having it rehearsed to them.

In preserving for us the words of friends who have passed away, the sound of voices which are stilled, the phonograph assumes its most beautiful and sacred character. The Egyptians treasured in their homes the mummies of their dead. We are able to cherish the very accents of ours, and, as it were, defeat the course of time and break the silence of the grave. The voices of illustrious persons, heroes and statesmen, orators, actors, and singers, will go down to posterity and visit us in our homes. A new pleasure will be added to life. How pleasant it would be if we could listen to the cheery voice of Gordon, the playing of Liszt, or the singing of Jenny Lind!

Doubtless the rendering of the phonograph will be still further improved as time goes on ; but even now it is remarkable ; and the inventor must be considered to have redeemed his promises with regard to it.

Notwithstanding his deafness, the development of the instrument has been a labour of love to him; and those who knew his rare inventive skill believed that he would some time achieve success. It is his favourite, his most original, and novel work. For many triumphs of mind over matter Edison has been called the 'Napoleon of Invention,' and the aptness of the title is enhanced by his personal resemblance to the great conqueror. But the phonograph is his victory of Austerlitz; and, like the printing-press of Gutenberg, it will assuredly immortalise his name.

'The phonograph,' said Edison of his favourite, 'is my baby, and Iexpect it to grow up a big fellow and support me in my old age.' Some people are still in doubt whether it will prove more than a curious plaything; but even now it seems to be coming into practical use in America, if not in Europe.

After the publication of the phonograph, Edison, owing, it is stated, to an erroneous description of the instrument by a reporter, received letters from deaf people inquiring whether it would enable them to hear well. This, coupled with the fact that he is deaf himself, turned his thoughts to the invention of the 'megaphone,' a combination of one large speaking and two ear-trumpets, intended for carrying on a conversation beyond the ordinary range of the voice--in short, a mile or two. It is said to render a whisper audible at a distance of 1000 yards; but its very sensitiveness is a drawback, since it gathers up extraneous sounds.