div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader043vdocumentsusreader043viewer2022020522575067d01a28ab0f07ad431fhtml5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: Constitution of the Upper Atmosphere src=https:reader043vdocumentsusreader043viewer2022020522575067d01a28ab0f07ad431fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divp© 1934 Nature Publishing Grouppdivdiv class=ts-pagebuttonPage 2button div class=ts-image a href=https:reader043vdocumentsusreader043viewer2022020522575067d01a28ab0f07ad431fhtml5page2jpg target=_blank amp-img class=ts-thumb alt=Page 2: Constitution of the Upper Atmosphere src=https:reader043vdocumentsusreader043viewer2022020522575067d01a28ab0f07ad431fhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divp© 1934 Nature Publishing Grouppdiv