div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=sand-and-rock-specimens-from-reg-i-ruwanhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Sand and Rock Specimens from Reg-i-Ruwan loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentsnetreader030viewer2022020223575067bd1a28ab0f07aceb81html5thumbnails1jpg width=140 height=200 divp© 1924 Nature Publishing Grouppdiv