div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Dr R H Codrington src=https:reader038vdocumentsinreader038viewer2022100510575067ba1a28ab0f07ace01fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1922 Nature Publishing Grouppdiv