div class=trans-pagebuttonPage 1button div class=trans-image a href=https:reader042fdocumentsfrreader042viewer2022020522575067a21a28ab0f07ac6f09html5page1jpg target=_blank amp-img class=trans-thumb alt=Page 1: Recherches Expérimentales sur les Spectres dÉtincelles src=https:reader042fdocumentsfrreader042viewer2022020522575067a21a28ab0f07ac6f09html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divp© 1902 Nature Publishing Grouppdiv