div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=the-theory-of-heat-57989638b5419htmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: The Theory of Heat loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentsusreader035viewer2022080320575067c51a28ab0f07ad1420html5thumbnails1jpg width=140 height=200 divp© 1929 Nature Publishing Grouppdiv