div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: The Transmission of Speech by Light src=https:reader036fdocumentsinreader036viewer2022073015575067bb1a28ab0f07ace5d7html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1923 Nature Publishing Grouppdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: The Transmission of Speech by Light src=https:reader036fdocumentsinreader036viewer2022073015575067bb1a28ab0f07ace5d7html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divp© 1923 Nature Publishing Grouppdiv