div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Dr Leonard Klatzow src=https:reader036vdocumentspubreader036viewer2022081808575067e61a28ab0f07ada9d4html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1942 Nature Publishing Grouppdiv