div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader040vdocumentspubreader040viewer2022020522575067f61a28ab0f07adf1e0html5page1jpg target=_blank img data-url=non-adaptive-characters-57999ebc5309fhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Non-Adaptive Characters loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentspubreader040viewer2022020522575067f61a28ab0f07adf1e0html5thumbnails1jpg width=140 height=200 adivp©1949 Nature Publishing Grouppdiv