LIBROS DEL AUTOR: lewis coe

3 resultados para LIBROS DEL AUTOR: lewis coe

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  • Wireless Radio
    Lewis Coe
    In 1873 Scottish physicist James Clerk Maxwell first advanced the idea that there might be electromagnetic waves that were similar to light waves, a startling concept to the scientists of his day. About 13 years later, German physicist Heinrich Hertz demonstrated in his laboratory that electromagnetic radiation did indeed exist. But it was not until after Hertz’s death that ...
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    42,94 €

  • The Telephone and Its Several Inventors
    Lewis Coe
    On March 7, 1876, the U.S. Patent Office issued to a young inventor named Alexander Graham Bell what is arguably the most valuable patent ever: entitled 'improvements in telegraphy,' in truth it secured for Bell the basic principles involved in a telephone. On the same day that Bell filed his patent application, a caveat (a preliminary patent document) was filed by Elisha ...
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    42,80 €

  • The Telegraph
    Lewis Coe
    Samuel F.B. Morse’s invention of the telegraph marked a new era in communication. For the first time, people were able to communicate quickly from great distances. The genesis of Morse’s invention is covered in detail, starting in 1832, along with the establishment of the first transcontinental telegraph line in the United States and the dramatic effect the device had on t...
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    43,00 €