div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Energy Spectrum of Secondary Electrons from μ-Meson Decay src=https:reader031fdocumentorgreader031viewer2022020522575067f41a28ab0f07adec23html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1949 Nature Publishing Grouppdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Energy Spectrum of Secondary Electrons from μ-Meson Decay src=https:reader031fdocumentorgreader031viewer2022020522575067f41a28ab0f07adec23html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divp© 1949 Nature Publishing Grouppdiv