Professor Alexander Graham Bell filed a specification and drawings of the original Bell telephone. Bell's telephone was first exhibited in America at the Centennial Exhibition in Philadelphia in 1876; and in England, at the Glasgow meeting of the British Association in September of that year. On that occasion, Sir William Thomson (now Lord Kelvin) pronounced it, with enthusiasm, to be the 'greatest of all the marvels of the electric telegraph.' The surprise created by its first appearance was, however, nothing to the astonishment and delight which it aroused in this country when Professor Bell, the following year, himself exhibited it in London to the Society of Telegraph Engineers. Since then, its introduction as a valuable aid to social life has been very rapid, and the telephone is now to be found in use from China to Peru. THOMAS ALVA EDISON AND THE PHONOGRAPH. The Phonograph is an instrument for mechanically recording and reproducing articulate human speech, song, &c. It was invented by Mr T. A. Edison in the spring of 1877, at his Menlo Park Laboratory, New Jersey, and came into existence as the result of one of the many lines of experiment he was then engaged upon. Thomas Alva Edison, this notable American inventor, was born at Milan, Ohio, 11th February 1847, but his early years were spent at Port Huron, Michigan. His father was of Dutch, and his mother of Scotch descent; the latter, having been a teacher, gave him what schooling he received. Edison was a great reader in his youth, and at the age of twelve he became a newsboy on the Grand Trunk Line running into Detroit, and began to experiment in chemistry. Gaining the exclusive right of selling newspapers on this line, and purchasing some old type, with the aid of four assistants he printed and issued the _Grand Trunk Herald_, the first newspaper printed in a railway train. A station-master, in gratitude for his having saved his child from the front of an advancing train, taught him telegraphy, in which he had previously been greatly interested; and thenceforward he concentrated the energies of a very versatile mind chiefly upon electrical studies. [Illustration: Edison with his Phonograph.] Edison invented an automatic repeater, by means of which messages could be sent from one wire to another without the intervention of the operator. His system of duplex telegraphy was perfected while a telegraph operator in Boston, but was not entirely successful until 1872. In 1871 he became superintendent of the New York Gold and Stock Company, and here invented the printing-telegraph for gold and stock quotations, for the manufacture of which he established a workshop at Newark, N.J., continuing there till his removal to Menlo Park, N.J., in 1876. Ten years later he settled at Orange, at the foot of the Orange Mountains, his large premises at Menlo Park having grown too small for him.