div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=early-astronomy-and-the-observatory-of-leydenhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Early Astronomy and the Observatory of Leyden loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader038vdocumentsnetreader038viewer2022100510575067cf1a28ab0f07ad4069html5thumbnails1jpg width=140 height=200 divp© 1933 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=early-astronomy-and-the-observatory-of-leydenhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: Early Astronomy and the Observatory of Leyden loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader038vdocumentsnetreader038viewer2022100510575067cf1a28ab0f07ad4069html5thumbnails2jpg width=140 height=200 divp© 1933 Nature Publishing Grouppdiv