div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader040fdocumentsinreader040viewer2022020522575067df1a28ab0f07ad8a1ahtml5page1jpg target=_blank img data-url=documentbaade-and-zwickys-theory-of-cosmic-rays-and-the-helium-content-of-berylshtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Baade and Zwickys Theory of Cosmic Rays and the Helium Content of Beryls loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader040fdocumentsinreader040viewer2022020522575067df1a28ab0f07ad8a1ahtml5thumbnails1jpg width=140 height=200 adivp©1939 Nature Publishing Grouppdiv