div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Chair of Chemistry in University College Bangor src=https:reader036vdocumentssitereader036viewer2022073107575067e71a28ab0f07adaedchtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1943 Nature Publishing Grouppdiv