ฉันเป็นครูสอนวิชาสังคมศึกษา
Then two year later he agreed to give private lessons to a young boy whose family allowed him to use their basement as a workshop. this gave Alexander the opportunity to resume his experiment with sound transmitters . he used to spend all his free time and most of his money on his invention
she was a young girl who had lost her hearing and the ability to speak because of a childhood illness . her name was Mabel Hubbard and four year later they got married . Although many people thought that the plan to invent a human voice transmitters was a waste of time . Alexander refused to give up his dream . he continued his experiments with sound vibrations . he even copied the design of the human ear using iron rods and electrical to produce the same effect .
Alexander was spending so much time and energy on his invention he did less and less work with his students and soon run out of money . he was about to give up when he met Professor John Henry an expert on the telegraph and electricity