div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=absorption-curve-for-visual-purple-and-the-electrical-response-of-the-frogshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Absorption Curve for Visual Purple and the Electrical Response of the Frogs Eye loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentsusreader035viewer2022080320575067da1a28ab0f07ad74e8html5thumbnails1jpg width=140 height=200 divp© 1937 Nature Publishing Grouppdiv