div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader040vdocumentssitereader040viewer2022020522575067c71a28ab0f07ad1973html5page1jpg target=_blank img data-url=the-fifteenth-international-geological-congress-south-africa-1929htmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: The Fifteenth International Geological Congress South Africa 1929 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentssitereader040viewer2022020522575067c71a28ab0f07ad1973html5thumbnails1jpg width=140 height=200 adivp© 1930 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imagea href=https:reader040vdocumentssitereader040viewer2022020522575067c71a28ab0f07ad1973html5page2jpg target=_blank img data-url=the-fifteenth-international-geological-congress-south-africa-1929htmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: The Fifteenth International Geological Congress South Africa 1929 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentssitereader040viewer2022020522575067c71a28ab0f07ad1973html5thumbnails2jpg width=140 height=200 adivp© 1930 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imagea href=https:reader040vdocumentssitereader040viewer2022020522575067c71a28ab0f07ad1973html5page3jpg target=_blank img data-url=the-fifteenth-international-geological-congress-south-africa-1929htmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: The Fifteenth International Geological Congress South Africa 1929 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentssitereader040viewer2022020522575067c71a28ab0f07ad1973html5thumbnails3jpg width=140 height=200 adivp© 1930 Nature Publishing Grouppdiv