div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader040fdocumentsinreader040viewer2022021402575067be1a28ab0f07acf096html5page1jpg target=_blank img data-url=documentmr-otto-hehnerhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Mr Otto Hehner loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader040fdocumentsinreader040viewer2022021402575067be1a28ab0f07acf096html5thumbnails1jpg width=140 height=200 adivp© 1924 Nature Publishing Grouppdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader040fdocumentsinreader040viewer2022021402575067be1a28ab0f07acf096html5page2jpg target=_blank img data-url=documentmr-otto-hehnerhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: Mr Otto Hehner loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader040fdocumentsinreader040viewer2022021402575067be1a28ab0f07acf096html5thumbnails2jpg width=140 height=200 adivp© 1924 Nature Publishing Grouppdiv