There was a great fair in 1876. It was held in Philadelphia and was called the Centennial because it celebrated the one-hundredth birthday of our land. Persons came from foreign countries to attend the fair. Among these visitors was a famous Brazilian gentleman. He was a man of great knowledge and was interested in inventions. His name was Don Pedro, and at that time he was Emperor of Brazil. Because he was the ruler of a country, the officers of the Centennial showed him every attention, and tried to make his visit alive with interest. Late one afternoon they took him to the room where the judges were examining objects entered for exhibits. The judges were tired and wanted to go home. They did not care to listen to a young man standing before them. This young man was telling them that he had a new invention; it was a telephone, and would carry the sounds of the human voice by electricity. The judges did not believe this, and were about to dismiss the young man without even putting the receiver to their ears and seeing if he spoke the truth. Don Pedro stood in the doorway listening. He looked at the judges; he looked at the young man, and was disgusted and angered that an invention should not receive a fair trial. He stepped forward and as he did so looked squarely at the young man. To his surprise he recognized in him an acquaintance made while visiting in Boston. At once Don Pedro examined the new instrument and then turning to the judges asked permission to make a trial of it himself. The young inventor went to the other end of the wire, which was in another room, and spoke into the transmitter some lines from a great poem. Don Pedro heard perfectly, and his praise changed the mind of the judges. They decided to enter the invention as a "toy that might amuse the public." This toy was the Bell telephone, the young inventor was Alexander Graham Bell, and he had the satisfaction of seeing the "toy" become the greatest attraction to visitors at the Centennial. This must have brought comfort to his heart, for Mr. Bell had been trying for some time to have people see what a convenience his invention would be. He had first thought of the telephone while searching for some way to help deaf mutes to talk. His father and grandfather had both been voice teachers in Edinburgh and London, so when young Alexander came to America to seek his fortune it was natural he should teach methods of using the voice. But his pupils were unfortunate persons who could not talk because they were unable to hear the sounds of the voice. His father had worked out a plan for teaching the deaf, that the young man improved. It was based on observation of the position of the lips and other vocal organs, while uttering each sound. One by one the pupil learned the sounds by sight. Then he learned combinations of sounds and at last came to where he could "read the lips" and tell what a person was saying by looking at his moving lips.