[DOWNLOAD] "Upon the Production of Sound by Radiant Energy" by Alexander Graham Bell # Book PDF Kindle ePub Free
eBook details
- Title: Upon the Production of Sound by Radiant Energy
- Author : Alexander Graham Bell
- Release Date : January 21, 2013
- Genre: Science & Nature,Books,
- Pages : * pages
- Size : 5765 KB
Description
This paper was written by Alexander Graham Bell and read before the National Academy of Science on April 21, 1881. It expounds on what Bell believed to be his greatest invention, the photophone. A wireless telephone, the photophone transmitted sound on a beam of light.
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