div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=secondary-roentgen-rays-and-atomic-weighthtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Secondary Röntgen Rays and Atomic Weight loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentsmxreader031viewer2022020522575067a61a28ab0f07ac833bhtml5thumbnails1jpg width=140 height=200 divp© 1906 Nature Publishing Grouppdiv