The Telephone; or, Articulating Telegraph. - In 1876 the first working instrument of this nature was introduced to the public. Its real merits were shown and fully proven before a large audience, by Prof. Graham Bell, in the Boston Music Hall, where communication was had with Providence, forty-five miles away. It is now (1881) in practical and. successful operation over millions of miles, both in this and many foreign countries. The Bell telephone conveys plain articulate speech many hundred miles on telegraph wires. The British Government, which has for some years added the whole electric telegraph to their Post-Office system, have now added the Bell telephone to that organization. It is one of the most important and useful of human inventions.