電話發(fā)明者貝爾英文介紹-文庫吧資料
2025-08-11 10:21本頁面
【正文】 em in his own home. Early Life At the Age of 16, Graham began to teach music and speech at a boys school. Years later, Bell started teaching his fathers visual speech to deaf and hearing impaired children. Bell at age 29 Tuberculosis1870 In 1870, Bell?s two brothers died of tuberculosis. Since Bell was also threatened his family decided to move to a healthier environment, Canada. After Graham was safe from catching the disease, his job led him to be a physiology professor at Boston University in the United States. Hello Boston! Goodbye Canada! While Bell was in Massachusetts, he invented the harmonic telegraph, an instrument that makes it possible to send multiple telegraphs on one line. Boston University On March 7, 1876, Bell recieved his patent for the telephone. The Telephone is Patented “, e here, I want you.” On March 10, 1876, Alexander
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