div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=luminous-efficiency-of-rays-entering-the-eye-pupil-at-different-pointshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Luminous Efficiency of Rays entering the Eye Pupil at Different Points loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentsusreader030viewer2022020223575067d81a28ab0f07ad6a21html5thumbnails1jpg width=140 height=200 divp© 1937 Nature Publishing Grouppdiv